Collins English for the TOEFL Test – Vocabulary and Grammar for the TOEFL Test by Ingrid Wisniewska Reviews
Collins Skills for the TOEFL iBT Test is a three book series to help learners prepare for the Test of English as a Foreign Language, used by over 7,500 institutions in 130 countries as a measure of language ability. To date, 25 million learners have taken the test around the world.
In particular these books are aimed at helping learners handle the integrated-skill aspect of the test, where they are required to produce responses based on mixed input.