the title of the book is " the four imams"
also, Ashraf Ali Thanwi is a good author. There are current authers that are very good..however, are u hanafi? is so, then maybe you would want the links i give you, they have authors and whoel books online if you want and you can also purshace teh book.
There are two books that are partof life,
"love for Allah" & " the accepted Whispers" by ahsraf Ali thanwi.

i hope i helped some.
dua mei yaad
Ws.