The Kitab al-Tasrif (Arabic,كتاب التصريف لمن عجز عن التأليف) (The Method of Medicine) was an influential Arabic medical encyclopedia on medicine and surgery, written near the year 1000 CE by Abu al-Qasim al-Zahrawi (Abulcasis), the "father of modern surgery". The 30-volume work includes anatomical descriptions, classifications of diseases, information on nutrition and surgery, and sections on medicine, orthopaedics, ophthalmology, pharmacology, nutrition, and especially surgery.