In our print collection:

Barron's How to Prepare for the TOEFL iBT
REFERENCE PE1128.S5 2006

Cracking the TOEFL iBT
CAREER PE1128.3.C74 2009

The Official Guide to the TOEFL Test
CAREER PE1128.O44 2009

Writing for the TOEFL iBT
CAREER PE1128.L658 2008

 

Websites:

TOEFL
The official website for the Test of English as a Foreign Language (TOEFL) programs and services. Includes practice questions.