This is a compressed folder (zip) (277 Mb) that contains all 19 E-books for USMLE Step 2 CK:
Cardiovascular System - Endocrine, Diabetes and Metabolism & Male Reproductive System - GIT & Nutrition - Hemato-oncology - Nephrology -  Neurology - Pulmonology & Critical Care - Infectious Disease - Medical Minors: ENT, Ophthalmology, Dermatology, Allergy & Poisoning - Ethics, Legal, Professionalism & General Principles (Social sciences) - Pediatrics Part 1, 2, 3 - Surgery Part 1, 2, 3 - Obstetrics & Gynecology Part 1, 2 - Psychiatry.
 
After completing the payment, you will receive a downloadable zip file (compressed). After downloading it, you will need to extract it (using a zip app). After extracting it, you will find a folder that contains all 19 e-books (PDFs).