2 files changed, 9 insertions, 1 deletions
diff --git a/lib/backbone/file.js b/lib/backbone/file.js
index 34cf066..a58063c 100644
--- a/lib/backbone/file.js
+++ b/lib/backbone/file.js
@@ -1,3 +1,4 @@
+var _ = require('lodash');
 
 function BackboneFile(book) {
     if (!(this instanceof BackboneFile)) return new BackboneFile(book);
@@ -8,6 +9,8 @@ function BackboneFile(book) {
     // Filename in the book
     this.filename = '';
     this.parser;
+
+    _.bindAll(this);
 }
 
 // Type of the backbone file
diff --git a/lib/backbone/page.js b/lib/backbone/page.js
index 33bd636..a17e413 100644
--- a/lib/backbone/page.js
+++ b/lib/backbone/page.js
@@ -1,3 +1,4 @@
+var path = require('path');
 
 /*
 A page represent a parsable file in the book (Markdown, Asciidoc, etc)
@@ -11,8 +12,12 @@ function Page(book, filename) {
 }
 
 // Return the filename of the page with another extension
+// "README.md" -> "README.html"
 Page.prototype.withExtension = function(ext) {
-    return
+    return path.join(
+        path.dirname(this.filename),
+        path.basename(this.filename, path.extname(this.filename)) + ext
+    );
 };