Isbatun Nabuat book was written by Imam E Rabbani Mujaddid Alf Sani. The PDF version of this book is available here. If you are searching for this book, I can assure you that from here you will be able to get a PDF copy of this book without any cost. This book was initially published in 1992 by the Mujaddedia Kutubkhana publication. This book contains only 73 pages. You can also read this book online from here.