diff --git a/react-slideshow/package.json b/react-slideshow/package.json
index a349b73..729ea9a 100644
--- a/react-slideshow/package.json
+++ b/react-slideshow/package.json
@@ -1,6 +1,7 @@
 {
   "name": "react-slideshow",
   "version": "0.1.0",
+  "proxy": "http://localhost:4000",
   "private": true,
   "dependencies": {
     "@testing-library/jest-dom": "^4.2.4",
@@ -8,6 +9,7 @@
     "@testing-library/user-event": "^7.1.2",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
+    "react-router-dom": "^5.1.2",
     "react-scripts": "3.4.0"
   },
   "scripts": {
diff --git a/react-slideshow/src/App.css b/react-slideshow/src/App.css
index 74b5e05..41c7c05 100644
--- a/react-slideshow/src/App.css
+++ b/react-slideshow/src/App.css
@@ -1,3 +1,7 @@
+body, html, #root {
+  height: 100%;
+}
+
 .App {
   text-align: center;
 }
diff --git a/react-slideshow/src/App.js b/react-slideshow/src/App.js
index ce9cbd2..c29cf84 100644
--- a/react-slideshow/src/App.js
+++ b/react-slideshow/src/App.js
@@ -1,26 +1,166 @@
 import React from 'react';
-import logo from './logo.svg';
+import {
+  HashRouter as Router,
+  Switch,
+  Route,
+  useParams
+} from "react-router-dom";
+
 import './App.css';
 
-function App() {
-  return (
-    <div className="App">
-      <header className="App-header">
-        <img src={logo} className="App-logo" alt="logo" />
-        <p>
-          Edit <code>src/App.js</code> and save to reload.
-        </p>
-        <a
-          className="App-link"
-          href="https://reactjs.org"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          Learn React
-        </a>
-      </header>
-    </div>
-  );
+const IMAGE_CHUNK = 256;
+const roundup = (v, mod) => {
+  let r = v % mod;
+  if (r === 0) {
+    return v;
+  } else {
+    return v + (mod - r);
+  }
+};
+
+class Album extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      error: null,
+      mediaItems: null,
+      idx: 0,
+    };
+  }
+  componentDidMount() {
+    let {album} = this.props;
+    fetch(process.env.PUBLIC_URL + `/api/album/${album}`)
+      .then(res => res.json())
+      .then(
+        (result) =>  this.setState({mediaItems: result}),
+        (error) => this.setState({error}),
+      );
+  }
+  render() {
+    // TODO(wathiede): fade transition.
+    // TODO(wathiede): pair-up portrait orientation images.
+    // TODO(wathiede): fetch an image that maintains the originals aspect ratio
+    let w = window.innerWidth * window.devicePixelRatio;
+    let h = window.innerHeight * window.devicePixelRatio;
+    let ratio = w/h;
+    if (ratio > 1) {
+      // Landscape image
+      w = roundup(w, IMAGE_CHUNK);
+      h = (w/ratio).toFixed();
+    } else {
+      // Portrait image
+      h = roundup(h, IMAGE_CHUNK);
+      w = (h/ratio).toFixed();
+    }
+
+    //let w = roundup(window.innerWidth*window.devicePixelRatio, IMAGE_CHUNK);
+    //let h = roundup(window.innerHeight*window.devicePixelRatio, IMAGE_CHUNK);
+    let {idx, error, mediaItems} = this.state;
+    if (error !== null) {
+      return <h2>Error: {JSON.stringify(error)}</h2>;
+    } else if (mediaItems !== null) {
+      let numImages = mediaItems.length;
+      let nextIdx = (idx+1)%numImages;
+      let prevIdx = (numImages+idx-1)%numImages;
+      let image = mediaItems[idx];
+      let nextImage = mediaItems[nextIdx];
+      let style = {
+        height: '100%',
+        width: '100%',
+        backgroundColor: 'black',
+        backgroundImage: `url(/api/image/${image.id}?w=${w}&h=${h})`,
+        backgroundRepeat: 'no-repeat',
+        backgroundPosition: 'center center',
+        backgroundSize: 'cover',
+      };
+      let prefetchStyle = {
+        // display: 'none'
+        position: 'absolute',
+        right: 0,
+        bottom: 0,
+        width: '25%',
+        height: '25%',
+      };
+      console.log(`window.devicePixelRatio ${window.devicePixelRatio}`);
+      return <div style={style} onClick={(e)=>{
+        e.stopPropagation();
+        this.setState({idx: nextIdx})
+      }}>
+        <img
+          style={prefetchStyle}
+          onClick={(e)=>{
+            e.stopPropagation();
+            this.setState({idx: prevIdx})
+          }}
+          src={`/api/image/${nextImage.id}?w=${w}&h=${h}`} alt="prefetch next" />
+        </div>;
+    } else {
+      return <h2>Loading...</h2>;
+    }
+  }
+}
+
+class AlbumIndex extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      error: null,
+      albums: null,
+    };
+  }
+  componentDidMount() {
+    fetch(process.env.PUBLIC_URL + "/api/albums")
+      .then(res => res.json())
+      .then(
+        (result) =>  this.setState({albums: result}),
+        (error) => this.setState({error}),
+      );
+  }
+  render() {
+    let {error, albums} = this.state;
+    if (error !== null) {
+      return <h2>Error: {JSON.stringify(error)}</h2>;
+    } else if (albums !== null) {
+      return albums.map((a) => {
+        let img = <img src="https://via.placeholder.com/256x128" className="mr-3" alt="unset"/>;
+        if (a.coverPhotoMediaItemId !== undefined) {
+          img = <img src={ `/api/image/${a.coverPhotoMediaItemId}?w=256&h=256` } className="mr-3" alt={ a.title }/>
+        }
+
+        let figure = <figure key={ a.id } className="figure">
+          {img}
+          <figcaption className="figure-caption">{ a.title || "No title" } - { a.mediaItemsCount || 0 } photos </figcaption>
+        </figure>;
+        return <a key={ a.id } href={ '#' + a.id }>
+            { figure }
+          </a>
+      });
+    } else {
+      return <h2>Loading...</h2>;
+    }
+  }
+}
+
+const AlbumRoute = () => {
+  // We can use the `useParams` hook here to access
+  // the dynamic pieces of the URL.
+  let { albumId } = useParams();
+  return <Album album={albumId} />;
+}
+
+const App = () => {
+  return <Router>
+      <Switch>
+        <Route exact path="/">
+          <div className="container">
+            <AlbumIndex />
+          </div>
+        </Route>
+        <Route exact path="/:albumId">
+          <AlbumRoute />
+        </Route>
+      </Switch>
+    </Router>
 }
 
 export default App;
diff --git a/react-slideshow/yarn.lock b/react-slideshow/yarn.lock
index fd1af30..8f2147f 100644
--- a/react-slideshow/yarn.lock
+++ b/react-slideshow/yarn.lock
@@ -841,7 +841,7 @@
     "@babel/helper-plugin-utils" "^7.8.3"
     "@babel/plugin-transform-typescript" "^7.8.3"
 
-"@babel/runtime@7.8.4", "@babel/runtime@^7.0.0", "@babel/runtime@^7.3.4", "@babel/runtime@^7.4.5", "@babel/runtime@^7.5.1", "@babel/runtime@^7.6.2", "@babel/runtime@^7.6.3", "@babel/runtime@^7.7.2", "@babel/runtime@^7.7.6":
+"@babel/runtime@7.8.4", "@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.3.4", "@babel/runtime@^7.4.0", "@babel/runtime@^7.4.5", "@babel/runtime@^7.5.1", "@babel/runtime@^7.6.2", "@babel/runtime@^7.6.3", "@babel/runtime@^7.7.2", "@babel/runtime@^7.7.6":
   version "7.8.4"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.8.4.tgz#d79f5a2040f7caa24d53e563aad49cbc05581308"
   integrity sha512-neAp3zt80trRVBI1x0azq6c57aNBqYZH8KhMm3TaB7wEI5Q4A2SHfBHE8w9gOhI/lrqxtEbXZgQIrHP+wvSGwQ==
@@ -4574,6 +4574,11 @@ growly@^1.3.0:
   resolved "https://registry.yarnpkg.com/growly/-/growly-1.3.0.tgz#f10748cbe76af964b7c96c93c6bcc28af120c081"
   integrity sha1-8QdIy+dq+WS3yWyTxrzCivEgwIE=
 
+gud@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/gud/-/gud-1.0.0.tgz#a489581b17e6a70beca9abe3ae57de7a499852c0"
+  integrity sha512-zGEOVKFM5sVPPrYs7J5/hYEw2Pof8KCyOwyhG8sAF26mCAeUFAcYPu1mwB7hhpIP29zOIBaDqwuHdLp0jvZXjw==
+
 gzip-size@5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/gzip-size/-/gzip-size-5.1.1.tgz#cb9bee692f87c0612b232840a873904e4c135274"
@@ -4691,6 +4696,18 @@ hex-color-regex@^1.1.0:
   resolved "https://registry.yarnpkg.com/hex-color-regex/-/hex-color-regex-1.1.0.tgz#4c06fccb4602fe2602b3c93df82d7e7dbf1a8a8e"
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
+history@^4.9.0:
+  version "4.10.1"
+  resolved "https://registry.yarnpkg.com/history/-/history-4.10.1.tgz#33371a65e3a83b267434e2b3f3b1b4c58aad4cf3"
+  integrity sha512-36nwAD620w12kuzPAsyINPWJqlNbij+hpK1k9XRloDtym8mxzGYl2c17LnV6IAGB2Dmg4tEa7G7DlawS0+qjew==
+  dependencies:
+    "@babel/runtime" "^7.1.2"
+    loose-envify "^1.2.0"
+    resolve-pathname "^3.0.0"
+    tiny-invariant "^1.0.2"
+    tiny-warning "^1.0.0"
+    value-equal "^1.0.1"
+
 hmac-drbg@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
@@ -4700,6 +4717,13 @@ hmac-drbg@^1.0.0:
     minimalistic-assert "^1.0.0"
     minimalistic-crypto-utils "^1.0.1"
 
+hoist-non-react-statics@^3.1.0:
+  version "3.3.2"
+  resolved "https://registry.yarnpkg.com/hoist-non-react-statics/-/hoist-non-react-statics-3.3.2.tgz#ece0acaf71d62c2969c2ec59feff42a4b1a85b45"
+  integrity sha512-/gGivxi8JPKWNm/W0jSmzcMPpfpPLc3dY/6GxhX2hQ9iGj3aDfklV4ET7NjKpSinLpJ5vafa9iiGIEZg10SfBw==
+  dependencies:
+    react-is "^16.7.0"
+
 hosted-git-info@^2.1.4:
   version "2.8.5"
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.5.tgz#759cfcf2c4d156ade59b0b2dfabddc42a6b9c70c"
@@ -5356,6 +5380,11 @@ is-wsl@^2.1.1:
   resolved "https://registry.yarnpkg.com/is-wsl/-/is-wsl-2.1.1.tgz#4a1c152d429df3d441669498e2486d3596ebaf1d"
   integrity sha512-umZHcSrwlDHo2TGMXv0DZ8dIUGunZ2Iv68YZnrmCiBPkZ4aaOhtv7pXJKeki9k3qJ3RJr0cDyitcl5wEH3AYog==
 
+isarray@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
+  integrity sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=
+
 isarray@1.0.0, isarray@^1.0.0, isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
@@ -6199,7 +6228,7 @@ loglevel@^1.6.6:
   resolved "https://registry.yarnpkg.com/loglevel/-/loglevel-1.6.7.tgz#b3e034233188c68b889f5b862415306f565e2c56"
   integrity sha512-cY2eLFrQSAfVPhCgH1s7JI73tMbg9YC3v3+ZHVW67sBS7UxWzNEk/ZBbSfLykBWHp33dqqtOv82gjhKEi81T/A==
 
-loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.4.0:
+loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.2.0, loose-envify@^1.3.1, loose-envify@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"
   integrity sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==
@@ -6401,6 +6430,15 @@ min-indent@^1.0.0:
   resolved "https://registry.yarnpkg.com/min-indent/-/min-indent-1.0.0.tgz#cfc45c37e9ec0d8f0a0ec3dd4ef7f7c3abe39256"
   integrity sha1-z8RcN+nsDY8KDsPdTvf3w6vjklY=
 
+mini-create-react-context@^0.3.0:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/mini-create-react-context/-/mini-create-react-context-0.3.2.tgz#79fc598f283dd623da8e088b05db8cddab250189"
+  integrity sha512-2v+OeetEyliMt5VHMXsBhABoJ0/M4RCe7fatd/fBy6SMiKazUSEt3gxxypfnk2SHMkdBYvorHRoQxuGoiwbzAw==
+  dependencies:
+    "@babel/runtime" "^7.4.0"
+    gud "^1.0.0"
+    tiny-warning "^1.0.2"
+
 mini-css-extract-plugin@0.9.0:
   version "0.9.0"
   resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.9.0.tgz#47f2cf07aa165ab35733b1fc97d4c46c0564339e"
@@ -7168,6 +7206,13 @@ path-to-regexp@0.1.7:
   resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-0.1.7.tgz#df604178005f522f15eb4490e7247a1bfaa67f8c"
   integrity sha1-32BBeABfUi8V60SQ5yR6G/qmf4w=
 
+path-to-regexp@^1.7.0:
+  version "1.8.0"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-1.8.0.tgz#887b3ba9d84393e87a0a0b9f4cb756198b53548a"
+  integrity sha512-n43JRhlUKUAlibEJhPeir1ncUID16QnEjNpwzNdO3Lm4ywrBpBZ5oLD0I6br9evr1Y9JTqwRtAh7JLoOzAQdVA==
+  dependencies:
+    isarray "0.0.1"
+
 path-type@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-2.0.0.tgz#f012ccb8415b7096fc2daa1054c3d72389594c73"
@@ -8249,11 +8294,40 @@ react-error-overlay@^6.0.6:
   resolved "https://registry.yarnpkg.com/react-error-overlay/-/react-error-overlay-6.0.6.tgz#ac4d9dc4c1b5c536c2c312bf66aa2b09bfa384e2"
   integrity sha512-Yzpno3enVzSrSCnnljmr4b/2KUQSMZaPuqmS26t9k4nW7uwJk6STWmH9heNjPuvqUTO3jOSPkHoKgO4+Dw7uIw==
 
-react-is@^16.8.1, react-is@^16.8.4:
+react-is@^16.6.0, react-is@^16.7.0, react-is@^16.8.1, react-is@^16.8.4:
   version "16.12.0"
   resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.12.0.tgz#2cc0fe0fba742d97fd527c42a13bec4eeb06241c"
   integrity sha512-rPCkf/mWBtKc97aLL9/txD8DZdemK0vkA3JMLShjlJB3Pj3s+lpf1KaBzMfQrAmhMQB0n1cU/SUGgKKBCe837Q==
 
+react-router-dom@^5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/react-router-dom/-/react-router-dom-5.1.2.tgz#06701b834352f44d37fbb6311f870f84c76b9c18"
+  integrity sha512-7BPHAaIwWpZS074UKaw1FjVdZBSVWEk8IuDXdB+OkLb8vd/WRQIpA4ag9WQk61aEfQs47wHyjWUoUGGZxpQXew==
+  dependencies:
+    "@babel/runtime" "^7.1.2"
+    history "^4.9.0"
+    loose-envify "^1.3.1"
+    prop-types "^15.6.2"
+    react-router "5.1.2"
+    tiny-invariant "^1.0.2"
+    tiny-warning "^1.0.0"
+
+react-router@5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/react-router/-/react-router-5.1.2.tgz#6ea51d789cb36a6be1ba5f7c0d48dd9e817d3418"
+  integrity sha512-yjEuMFy1ONK246B+rsa0cUam5OeAQ8pyclRDgpxuSCrAlJ1qN9uZ5IgyKC7gQg0w8OM50NXHEegPh/ks9YuR2A==
+  dependencies:
+    "@babel/runtime" "^7.1.2"
+    history "^4.9.0"
+    hoist-non-react-statics "^3.1.0"
+    loose-envify "^1.3.1"
+    mini-create-react-context "^0.3.0"
+    path-to-regexp "^1.7.0"
+    prop-types "^15.6.2"
+    react-is "^16.6.0"
+    tiny-invariant "^1.0.2"
+    tiny-warning "^1.0.0"
+
 react-scripts@3.4.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/react-scripts/-/react-scripts-3.4.0.tgz#f413680f0b5b937c8879ba1ffdae9b8c5b364bf5"
@@ -8611,6 +8685,11 @@ resolve-from@^4.0.0:
   resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-4.0.0.tgz#4abcd852ad32dd7baabfe9b40e00a36db5f392e6"
   integrity sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==
 
+resolve-pathname@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/resolve-pathname/-/resolve-pathname-3.0.0.tgz#99d02224d3cf263689becbb393bc560313025dcd"
+  integrity sha512-C7rARubxI8bXFNB/hqcp/4iUeIXJhJZvFPFPiSPRnhU5UPxzMFIl+2E6yY6c4k9giDJAhtV+enfA+G89N6Csng==
+
 resolve-url-loader@3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/resolve-url-loader/-/resolve-url-loader-3.1.1.tgz#28931895fa1eab9be0647d3b2958c100ae3c0bf0"
@@ -9610,6 +9689,16 @@ timsort@^0.3.0:
   resolved "https://registry.yarnpkg.com/timsort/-/timsort-0.3.0.tgz#405411a8e7e6339fe64db9a234de11dc31e02bd4"
   integrity sha1-QFQRqOfmM5/mTbmiNN4R3DHgK9Q=
 
+tiny-invariant@^1.0.2:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/tiny-invariant/-/tiny-invariant-1.1.0.tgz#634c5f8efdc27714b7f386c35e6760991d230875"
+  integrity sha512-ytxQvrb1cPc9WBEI/HSeYYoGD0kWnGEOR8RY6KomWLBVhqz0RgTwVO9dLrGz7dC+nN9llyI7OKAgRq8Vq4ZBSw==
+
+tiny-warning@^1.0.0, tiny-warning@^1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/tiny-warning/-/tiny-warning-1.0.3.tgz#94a30db453df4c643d0fd566060d60a875d84754"
+  integrity sha512-lBN9zLN/oAf68o3zNXYrdCt1kP8WsiGW8Oo2ka41b2IM5JL/S1CTyX1rW0mb/zSuJun0ZUrDxx4sqvYS2FWzPA==
+
 tmp@^0.0.33:
   version "0.0.33"
   resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.33.tgz#6d34335889768d21b2bcda0aa277ced3b1bfadf9"
@@ -9950,6 +10039,11 @@ validate-npm-package-license@^3.0.1:
     spdx-correct "^3.0.0"
     spdx-expression-parse "^3.0.0"
 
+value-equal@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/value-equal/-/value-equal-1.0.1.tgz#1e0b794c734c5c0cade179c437d356d931a34d6c"
+  integrity sha512-NOJ6JZCAWr0zlxZt+xqCHNTEKOsrks2HQd4MqhP1qy4z1SkbEP467eNx6TgDKXMvUOb+OENfJCZwM+16n7fRfw==
+
 vary@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"