Bob's Bible: Words, Anagrams & Hooks (Scrabble)
Book by Robert Gillis, listing 2-8 letter words along with their front hooks, back hooks, and anagrams.

Scrabble Bonus Words Techniques
Offering strategies and techniques to form Scrabble bonus words. Compatible with every official Scrabble dictionary. Free weekly newsletter.

The Official SCRABBLE (r) Players Dictionary, Third Edition
A newly revised and updated edition of the book that millions of Scrabble players call their bible. Authorized by the makers of Scrabble Brand crossword games and endorsed by the National Scrabble Association for recreational and school use.