The book *Differential Diagnosis of Internal Diseases*, edited by G.P. Matveykov, is an indispensable resource for anyone interested in medicine, especially in the field of disease diagnosis. Led by the expertise of seasoned physician and researcher Grigory Pavlovich Matveykov, this work serves not only as a comprehensive reference but also as a true guide through the complex world of internal illnesses. From the very first pages, readers are drawn into the fascinating—and sometimes intricate—process of diagnosis. The book covers a wide range of conditions, offering detailed descriptions of symptoms, diagnostic methods, and potential treatment options. What truly sets this handbook apart, however, is its emphasis on differential diagnosis—the skill of distinguishing between diseases with similar symptoms to uncover the true underlying cause. This focus makes it especially valuable for medical professionals, students, and anyone eager to deepen their understanding of medicine. Who will find this book useful? Primarily, it is an essential tool for medical students, interns, and practicing doctors seeking to organize their knowledge and enhance their professional skills. But it also appeals to a broader audience—those interested in gaining a clearer understanding of their health and the processes occurring within the body. If you’re curious about medicine, want to learn how doctors think and make decisions, this book will be a revelation. Beyond its practical content, *Differential Diagnosis of Internal Diseases* explores philosophical questions related to medical ethics, the importance of thorough history-taking, and the vital interaction between doctor and patient. This makes the book not only a practical manual but also a profound reflection on the role of the physician in today’s world. The style of author and editor Grigory Pavlovich Matveykov is characterized by clarity and accessibility. He skillfully combines scientific terminology with straightforward language, making complex concepts easy to grasp. Known for his other works on internal diseases and diagnostics, Matveykov’s extensive experience and deep medical knowledge make every page of this book rich with valuable insights. *Differential Diagnosis of Internal Diseases* will be a valuable addition to the library of every healthcare professional and student. It will support daily practice and serve as a reliable guide in challenging diagnostic situations. If you’re looking for high-quality literature that blends theory with practical application, this handbook is your ideal choice. Don’t miss the opportunity to explore the world of medicine through this book. It will help you expand your knowledge, develop critical thinking skills, and become more confident in your expertise. Discover the secrets of diagnosis and enhance your skills—your journey toward medical mastery begins here.