This edition is meticulously structured to simulate the actual examination experience. It features five full-length mock papers, each containing 100 Best-of-Five (BOF) questions. I strongly recommend that candidates self-assess by completing each paper within the three-hour time limit. Following the attempt, candidates should utilize the detailed explanations provided and the answer key to reinforce learning. Furthermore, each question includes a specified "objective," guiding you to review the core knowledge area and prompting deeper study using accredited internal medicine textbooks to comprehensively address any knowledge gaps. Key updates for the 2026 edition: Building upon the successful “Third Edition,” which incorporated updates on COVID-19 and women's health, this 2026 edition has undergone a rigorous revision. It specifically targets novel and emerging diseases, new diagnostic tests and methodologies, recently appeared examination themes, updated clinical guidelines, and newly approved treatments. Numerous tables have been incorporated. “Paper Five” is the 2026 one and mainly addresses new and updated concepts in the management and treatment of various diseases.