Mufti Abdur Raoof Sakharwi has authored a kitaab in Urdu regarding the famous Dua of Anas (Radhiyallahu Anhu) which he read in front of Hajjaaj. There exists different versions of this dua. In this book Mufti saheb has gathered between the different narrations and complied one comprehensive Dua.
Click here for the translation of this Book.