Mahaditheen-e-AzzaamAurUnkiKitabonKaTaaruf by Saleem Allah, it is an Urdu book exploring an introduction of writers of Books of hadiths. There are six major and main sources of Hadith Books in Sunni Islam and in Shiism , also books about hadiths. As well as writer (Compiler) of this book included names and biography of other popular writers of Hadith Books. The purpose of this book is to educate students of Muslims about writers of Books of hadiths before they get education of Hadiths. Saleem Allah Khan compiled this book in a pretty style, that he added para wise comments and biography of writers in details.