Answer:
There is no single book that covers all diseases comprehensively, as the field of medicine and healthcare is constantly evolving with new research and discoveries. However, there are several well-regarded medical reference books that provide detailed information on various diseases, symptoms, diagnosis, and treatment options.One example is Harrison's Principles of Internal Medicine, which is a comprehensive textbook that covers a wide range of medical topics, including diseases and conditions, pharmacology, and clinical procedures. Another resource is the Merck Manual of Diagnosis and Therapy, which is a trusted reference guide for healthcare professionals and patients alike. Both of these resources are regularly updated with the latest information in the field of medicine. However, it's important to note that these books are intended for medical professionals and may be too technical or complex for general readers.