A masterpiece Book and Encyclopedia on life of Sahaba Karam Radiallahu Anhum
Maulana Yusuf refused, saying, "I am an Ummati and Dawah is for whole Muslim .I am not the standard.
The huzur e Pak sallallahu Alaihi Wasallam and Sahabah are the standard for Dawah and its Manhaj.
That is why Maulana Yusuf R.A. wrote Hayatus Sahabah / The Lives of Sahaba ."