The Canon of Medicine is an encyclopedia of medicine in five books compiled by Ibn Sn (Avicenna) It presents a clear and organized summary of all the medical knowledge of the time. It is the most influential Galenic document of the Middle Ages Originally written in the Arabic language, the book was later translated into a number of other languages, including Persian, Latin, Chinese, Hebrew, German, French, and English with lots of commentaries. The Canon is considered one of the most famous books in the history of medicine

Al-Qanun fi al-Tibb.

Ibn Sinas Al-Qnn f al-ibb (The canon of medicine) is his best known work. Summarizing the medical knowledge of the time and comprising five volumes, it is considered one of the great classics in the history of medicine. It was regarded as a medical authority as late as the early 19th century. According to Sarton, The Canon of Medicine contains some of the most illuminating thoughts pertaining to distinction of mediastinitis from pleurisy; contagious nature of phthisis; distribution of diseases by water and soil; careful description of skin troubles; of sexual diseases and perversions; [and] of nervous ailments.

Source: google search

Ab Al al-usayn ibn Abd Allh ibn Sn, commonly known as Ibn Sn or by his Latinized name Avicenna