How to Prepare for the TOEFL Essay (Barron's How to Prepare for the Computer-Based Toefl Essay)
Kaplan TOEFL iBT with CD-ROM 2008-2009
Kaplan TOEFL Vocabulary Flashcards
TOEFL iBT Audio CD Package (Barrons How to Prepare for the TOEFL)
Cracking the GMAT, 2008 Edition (Graduate School Test Preparation) These books will help you to prepare for the tests.