When I first got Rocky last December I went to Amazon and purchased "The Bearded Dragon Manual" based on high user reviews, and it's very affordable at under $10 USD as well.
Here is the link to the US order page of Amazon for that book:
http://www.amazon.com/Bearded-Dragon-Advanced-Vivarium-Systems/dp/1882770595/ref=sr_1_1?ie=UTF8&qid=1414871153&sr=8-1&keywords=bearded+dragon+book
However as the previous poster stated, I would rely and trust the very experienced bearded dragon owners and articles of this website as your primary source of information. That book is certainly a nice and informative book and offers a great source for good information. However I would trust specific UV and best temperature information etc from this website over what's offered in that book.
The articles here are awesome for all your general care information and the forums can be an outstanding way here to ask very specific questions for your own bearded dragons specific situation.
NO BOOK can possibly give you the kind of awesome care and answers that other experienced bearded dragons owners can!
As the previous poster also mentioned, the search bar above is a great way to get answers and great information quickly here on this website!
Hope this helps in some way.
- Zaxx