One of the leaders of GMAT prep in the U.S. is Manhattan GMAT. The company features a phenomenal 10-volume preparation set that includes volumes on Mathematics, Critical Reasoning, Reading Comprehension, and Sentence Correction.
Be aware, though, that the Manhattan GMAT prep requires you to have basic knowledge and understanding of math. This is not for the beginner, and if you need a Math Foundations book, they have one but maybe Kaplan is a better option.
Though the MGMAT prep books are seen as a great help, many students will not be able to operate at the books’ level when they begin. Many students will need more support in math first, and others, more support in verbal skills. On the other GMAT subject fields, MGMAT’s foundation books are very useful.
Manhattan GMAT (MGMAT) has really set the standard when it comes to GMAT prep material in print, and the company’s 10-book set is perfect for students ready to get all set for the challenging GMAT (Graduate Management Admission Test).
Some refer to the MGMAT prep books as ‘the GMAT bible’. For students who are not ready to take a dive into the deep yet, MGMAT has published two books with foundational studies that precede the required high-level GMAT preparation.