The Kaplan GRE Complete 2018 Book Set is a comprehensive collection of workbooks designed for exam preparation. Published by Kaplan Publishing in the United States, this set includes books on math and verbal preparation, along with workbooks to help students practice and review key concepts. The books are in English language and are authored by Kaplan, a trusted name in education. With a focus on education and exam readiness, this set is a valuable resource for individuals looking to prepare for the GRE.