"400 Must Have Words for TOEFL" is a self-study guide aimed at improving TOEFL test scores, specifically tailored for the Internet-based TOEFL ofThe book is structured for easy completion within about 25 minutes, making it convenient for both individual study and classroom use for TOEFL preparation.

Featuring chapters with 10 target words each, accompanied by definitions, sample sentences, and usage tips, the book offers a comprehensive approach to expanding vocabulary. Through three different exercises provided in each chapter, including TOEFL-style readings and questions, learners can practice and enhance their language skills effectively. Additionally, the book includes valuable test-taking advice in the front section for TOEFL success.