Just started using Revit 2013. What books are good for beginners?

In addition to Mastering Revit 2013, This book is awesome for creating families:

http://www.littledetailscount.com/index.php/products/revit-family-bundle-11-ebook-creating-custom-revit-architecture-2012--2013families

Then, In Revit use the following:
Function Key: F1

Mastering Revit 2013 is a really helpful book.

Try Paul Aubin's video tutorials. you can find them in Lynda.com ( you have to pay for them unless you find a friend who willing share it).
There are tons of blogs and websites, but for start I would recommend the official forum, revitcity and the AUGI magazine.
Regards
Nando
P.S. don't give up.

check out the best video tutorial, cadlearning.... and they do it in sequence of learning

Autodesk University may not be a book but its really good!