It was in the U.S.A. that I first had the idea of writing a book about Abu Bakr Assiddeeq. In the summer of 1982 , I visited my son who was studying engineering at Pennsylvania State University. One night he invited some of his fellow-students to his apartment and they asked a lot of questions about Islam. I noticed that there was considerable interest in Abu Bakr, Prophet Mohammed's closest follower and friend. I am now trying to remember those students' questions and to supply adequate answers, in the hope that these answers will be appreciated by them and that other people all over the world will read them and benefit from them.