Who was the author of the book of travels, called Rihla, written in Arabic, providing extremely rich and interesting details about India?

The author of the book ‘India Divided’ was :

The book ‘The Man Who Divided India’ was written by

In which one of the following jails, the book “Discovery of India” was written by Jawaharlal Nehru:

Who authored the book “Poverty and the Unbritish Rule in India”?

Who is the author of the book “Discovery of India”?