The HESI NCLEX review book is a comprehensive study guide designed to help nursing students prepare for the NCLEX-RN exam. It covers all the key concepts and topics that are likely to appear on the exam, including pharmacology, anatomy and physiology, medical-surgical nursing, and more. The book also includes practice questions and quizzes to help students test their knowledge and identify areas where they need to focus their studying. Overall, the HESI NCLEX review book is a valuable resource for anyone looking to pass the NCLEX-RN exam and become a licensed nurse.