Prop Building Guidebook
At 383 pages, with over 575 color photographs and illustrations, it is the most comprehensive guide to prop building ever published, and it does so using professionally-produced props from well-known films and theatre productions. Nonetheless, it presents techniques usable for all skill levels and budgets.
The book's webpage, http://www.propbuildingguidebook.com, has information on where you can buy it (you can get it online at Amazon, Barnes and Noble, and most other major online retailers). The website also has how-to videos and bonus chapters, all of which is free to view and read even if you do not buy the book.