Manhattan Prep is not an individual author but rather a test preparation company known for providing high-quality educational resources and services, particularly for the Graduate Management Admission Test (GMAT). Founded in 2000 by Zeke Vanderhoek, Manhattan Prep offers a wide range of products and services, including prep books, live classes, online courses, and free study resources, all designed to help students perform at their best on standardized tests such as the GMAT, GRE, and LSAT. The company has earned a reputation for its rigorous curricula developed by experienced instructors, aiming to provide students with the strategies and skills needed to achieve high scores on competitive exams.