This is a book written by Brother Toyib Olawuyi. It is available online on This Link. He wrote this book using Authentic Narrations, covering different aspects related to this topic, and this makes this book very useful.

There are a lot of people especially belonging to Pakistan and India who primarily speak urdu, so I decided to translate it to Urdu language. Here is the Pdf version of Urdu translation.

Imam al-Mahdi

Please keep me in Your prayers.