diff --git a/src/public/javascripts/services/note_detail_book.js b/src/public/javascripts/services/note_detail_book.js
index 6af05e004..98f07846a 100644
--- a/src/public/javascripts/services/note_detail_book.js
+++ b/src/public/javascripts/services/note_detail_book.js
@@ -1,6 +1,18 @@
-import bundleService from "./bundle.js";
 import server from "./server.js";
 import linkService from "./link.js";
+import utils from "./utils.js";
+
+const MIN_ZOOM_LEVEL = 1;
+const MAX_ZOOM_LEVEL = 6;
+
+const ZOOMS = {
+    1: 100,
+    2: 49,
+    3: 32,
+    4: 24,
+    5: 19,
+    6: 16
+};
 
 class NoteDetailBook {
     /**
@@ -9,14 +21,32 @@ class NoteDetailBook {
     constructor(ctx) {
         this.ctx = ctx;
         this.$component = ctx.$tabContent.find('.note-detail-book');
+        this.$content = this.$component.find('.note-detail-book-content');
+        this.$zoomInButton = this.$component.find('.book-zoom-in');
+        this.$zoomOutButton = this.$component.find('.book-zoom-out');
+        this.setZoom(1);
+
+        this.$zoomInButton.click(() => this.setZoom(this.zoomLevel - 1));
+        this.$zoomOutButton.click(() => this.setZoom(this.zoomLevel + 1));
+    }
+
+    setZoom(zoomLevel) {
+        this.zoomLevel = zoomLevel;
+
+        this.$zoomInButton.prop("disabled", zoomLevel === MIN_ZOOM_LEVEL);
+        this.$zoomOutButton.prop("disabled", zoomLevel === MAX_ZOOM_LEVEL);
+
+        this.$content.find('.note-book').css("flex-basis", ZOOMS[zoomLevel] + "%");
     }
 
     async render() {
-        this.$component.empty();
+        this.$content.empty();
 
         for (const childNote of await this.ctx.note.getChildNotes()) {
-            this.$component.append(
+            this.$content.append(
                 $('<div class="note-book">')
+                    .css("flex-basis", ZOOMS[this.zoomLevel] + "%")
+                    .addClass("type-" + childNote.type)
                     .append($('<h5 class="note-book-title">').append(await linkService.createNoteLink(childNote.noteId, null, false)))
                     .append($('<div class="note-book-content">').append(await this.getNoteContent(childNote)))
             );
@@ -48,6 +78,35 @@ class NoteDetailBook {
         else if (note.type === 'image') {
             return $("<img>").attr("src", `api/images/${note.noteId}/${note.title}`);
         }
+        else if (note.type === 'file') {
+            function getFileUrl() {
+                // electron needs absolute URL so we extract current host, port, protocol
+                return utils.getHost() + "/api/notes/" + note.noteId + "/download";
+            }
+
+            const $downloadButton = $('<button class="file-download btn btn-primary" type="button">Download</button>');
+            const $openButton = $('<button class="file-open btn btn-primary" type="button">Open</button>');
+
+            $downloadButton.click(() => utils.download(getFileUrl()));
+            $openButton.click(() => {
+                if (utils.isElectron()) {
+                    const open = require("open");
+
+                    open(getFileUrl());
+                }
+                else {
+                    window.location.href = getFileUrl();
+                }
+            });
+
+            // open doesn't work for protected notes since it works through browser which isn't in protected session
+            $openButton.toggle(!note.isProtected);
+
+            return $('<div>')
+                .append($downloadButton)
+                .append(' &nbsp; ')
+                .append($openButton);
+        }
         else {
             return "<em>Content of this note cannot be displayed in the book format</em>";
         }
@@ -64,7 +123,7 @@ class NoteDetailBook {
     onNoteChange() {}
 
     cleanup() {
-        this.$component.empty();
+        this.$content.empty();
     }
 
     scrollToTop() {
diff --git a/src/public/stylesheets/relation_map.css b/src/public/stylesheets/relation_map.css
index c315bcea2..75f0fb118 100644
--- a/src/public/stylesheets/relation_map.css
+++ b/src/public/stylesheets/relation_map.css
@@ -75,9 +75,4 @@
 
 .note-detail-relation-map .ui-contextmenu {
     z-index: 100;
-}
-
-.note-detail-relation-map .floating-button {
-    position: absolute !important;
-    z-index: 100;
 }
\ No newline at end of file
diff --git a/src/public/stylesheets/style.css b/src/public/stylesheets/style.css
index b4a74dbce..ed670e122 100644
--- a/src/public/stylesheets/style.css
+++ b/src/public/stylesheets/style.css
@@ -819,10 +819,41 @@ a.external:not(.no-arrow):after, a[href^="http://"]:not(.no-arrow):after, a[href
     padding: 0.7rem 1rem !important; /* make modal header padding slightly smaller */
 }
 
+.floating-button {
+    position: absolute !important;
+    z-index: 100;
+}
+
+.note-detail-book-content {
+    display: flex;
+    flex-wrap: wrap;
+    overflow: auto;
+    align-content: start;
+}
+
 .note-book {
     border-radius: 10px;
     background-color: var(--accented-background-color);
     padding: 15px;
     margin: 10px;
     margin-left: 0;
+    max-height: 300px;
+    overflow: hidden;
+    display: flex;
+    flex-direction: column;
+    flex-shrink: 0;
+}
+
+.note-book.type-image .note-book-content, .note-book.type-file .note-book-content {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.note-book-title {
+    flex-grow: 0;
+}
+
+.note-book-content {
+    flex-grow: 1;
 }
\ No newline at end of file
diff --git a/src/public/stylesheets/themes.css b/src/public/stylesheets/themes.css
index 875ae7b90..0557e8b55 100644
--- a/src/public/stylesheets/themes.css
+++ b/src/public/stylesheets/themes.css
@@ -9,7 +9,7 @@
     --main-background-color: white;
     --main-text-color: black;
     --main-border-color: #ccc;
-    --accented-background-color: #eee;
+    --accented-background-color: #f5f5f5;
     --more-accented-background-color: #ccc;
     --header-background-color: #f8f8f8;
     --button-background-color: #eee;
diff --git a/src/services/import/mime.js b/src/services/import/mime.js
index 485c0cbee..3266b5a1e 100644
--- a/src/services/import/mime.js
+++ b/src/services/import/mime.js
@@ -79,7 +79,7 @@ function getMime(fileName) {
 }
 
 function getType(importContext, mime) {
-    mime = mime.toLowerCase();
+    mime = mime ? mime.toLowerCase() : '';
 
     if (importContext.textImportedAsText && (mime === 'text/html' || ['text/markdown', 'text/x-markdown'].includes(mime))) {
         return 'text';
@@ -96,7 +96,7 @@ function getType(importContext, mime) {
 }
 
 function normalizeMimeType(mime) {
-    mime = mime.toLowerCase();
+    mime = mime ? mime.toLowerCase() : '';
 
     if (!(mime in CODE_MIME_TYPES) || CODE_MIME_TYPES[mime] === true) {
         return mime;
diff --git a/src/views/details/book.ejs b/src/views/details/book.ejs
index 711b42625..35169052b 100644
--- a/src/views/details/book.ejs
+++ b/src/views/details/book.ejs
@@ -1 +1,13 @@
-<div class="note-detail-book note-detail-component"></div>
\ No newline at end of file
+<div class="note-detail-book note-detail-component">
+    <div class="btn-group floating-button" style="right: 25px; top: 20px;">
+        <button type="button"
+                class="book-zoom-in btn icon-button jam jam-search-plus"
+                title="Zoom In"></button>
+
+        <button type="button"
+                class="book-zoom-out btn icon-button jam jam-search-minus"
+                title="Zoom Out"></button>
+    </div>
+
+    <div class="note-detail-book-content"></div>
+</div>
\ No newline at end of file