1 files changed, 6 insertions, 0 deletions
diff --git a/lib/book.js b/lib/book.js
index 913df2f..fd20a94 100644
--- a/lib/book.js
+++ b/lib/book.js
@@ -13,6 +13,12 @@ var Page = require('./backbone/page');
 var pathUtil = require('./utils/path');
 var Promise = require('./utils/promise');
 
+
+/*
+The Book class is an interface for parsing books content.
+It does not require to run on Node.js, isnce it only depends on the fs implementation
+*/
+
 function Book(opts) {
     if (!(this instanceof Book)) return new Book(opts);