Endless Bliss (Se'âdet-i Ebediyye) - English Translation
Author: M. Siddik Gumus
This book is a great source of religious and spiritual knowledge for a Muslim that covers almost every aspect of Islam. Many letters from the Maktubat of Hazrat Mujaddid Alf Thani have been translated into this book.
It was originally written in Turkish and later translated into English.