Books
Two books are available:
- Cracking the GRE Math Test,” 4th edition
(ISBN13 = 978-0375429729 and ISBN10 = 0375429727). 
This book contains a practice exam and lots of review material covering the topics on the exam. There are also GRE-style review questions for each chapter.
The older editions of this book (ISBN 0375764917, 0375762671, or 0375753990) are similar. The book is currently on sale on amazon for $11.11. It can also be ordered at the book stores (e.g., the UCI bookstore). The Science library at UCI owns a copy. (Alternatively, you may try to borrow or purchase the book from our own grad students.)
- “GRE Mathematics Test” by REA, 5th edition
(ISBN13 = 978-0738608389 and ISBN10= 0738608386).
This book has six full length practice GRE Math Subject exams with solutions, and a review of the material on the exam. The price on Amazon is currently $17.13, and the book is not in the UCI library.
Although the book contains several errors, and the exams are a little outdated, there are over practice 300 questions in this book, so it is still a valuable resource. For your reference, the older edition of this book was called \The Best Test Preparation for the GRE Mathematics,” ISBN 0878916377.