Essentials of Pain Medicine 4th Edition by Honorio MD Benzon MD (Author), Srinivasa N. Raja MD (Author), Scott M Fishman MD (Author), Spencer Liu MD (Author), Steven P Cohen MD (Author), Robert W Hurley MD PhD (Editor) You can buy this product at Gangaram Jinnah Medical Books Shop for home delivery and Cash on delivery to all over Pakistan. All kind of medical books are available.