There are many books in a market. You must be careful about a book you choose. The test preparation software that comes with a book is equally important so look for a book that contains some CD too.

Some of the best books I have seen for TOEFL iBT preparation are:

Cambridge iBT TOEFL Preparation – comes with 8 CDs and 7 practice tests

Kaplan TOEFL iBT 2007-2008 – come with 4 sample tests

Longman Preparation Course for the TOEFL Test: Next Generation (iBT) – comes with 2 complete tests and many skill development programs

Barron's TOEFL iBT Internet-Based Test, 12th Edition - comes with 7 practice tests and other audio CDs.

These are the books I have currently in mind. Do few researches on your own and find a best book possible. I guess all of the following books are available for purchase at Amazon.

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