diff --git a/lib/ComicBook.js b/lib/ComicBook.js
index e5a7a70..ae57161 100644
--- a/lib/ComicBook.js
+++ b/lib/ComicBook.js
@@ -67,7 +67,9 @@ function ComicBook(id, srcs, opts) {
 	// the current page, can pass a default as a url hash
 	var pointer = (parseInt(location.hash.substring(1),10) - 1) || 0;
 
-	// enables the back button
+	/**
+	 * enables the back button
+	 **/
 	function checkHash() {
 		
 		var hash = parseInt(location.hash.substring(1),10) - 1 || 0;
@@ -100,7 +102,17 @@ function ComicBook(id, srcs, opts) {
 		// check if the user clicked on the left or right side
 		return (x <= canvas.width / 2) ? 'left' : 'right';
 	}
-	
+
+	/**
+	 * Tell the library app where the user is up to
+	 **/
+	function setLastPage() {
+		if (!options.data.comicId) { throw 'options.data.comicId is not set.'; }
+		$.get('/comic/setlastpage', { page: pointer+1, comic: options.data.comicId }, function(error){
+			console.log(error);
+		});
+	}
+
 	/**
 	 * Setup the canvas element for use throughout the class.
 	 * 
@@ -211,7 +223,9 @@ function ComicBook(id, srcs, opts) {
 		var offsetW = 0, offsetH = 0;
 		var page = pages[pointer];
 		var page2 = pages[pointer + 1];
-		
+
+		setLastPage();
+
 		if (typeof page !== "object") { throw "invalid page type '"+ typeof page +"'"; }
 		
 		var width = page.width;
@@ -320,7 +334,7 @@ function ComicBook(id, srcs, opts) {
 	ComicBook.prototype.drawPrevPage = function () {
 
 		is_double_page_spread = (pages[pointer-1].width > pages[pointer-1].height); // need to run double page check again here as we are going backwards
-
+		
 		if (pointer > 0) {
 			pointer -= (options.displayMode === "single" || is_double_page_spread) ? 1 : 2;
 			this.drawPage();