This three-volume series is expertly designed for comprehensive USMLE preparation. It is crucial to understand that the first two volumes provide an indispensable, integrated foundation of basic science and clinical knowledge, making them essential for both Step 1 and Step 2 CK. The third volume is dedicated exclusively to the Step 3 CCS. Volume 1 covers the foundational disciplines essential for both exams, including Immunology, General Microbiology, Infectious Diseases, Hematology, Oncology, Endocrinology, Neurology, Psychiatry, Ethics, Dermatology, Musculoskeletal disorders, Ophthalmology, and ENT. Volume 2 delves into major clinical specialties tested across both exams, such as Cardiology, Pulmonology, Gastroenterology, Nephrology, Urology, Gynecology, Obstetrics, Pediatrics, and Toxicology.