In Larry Niven and Jerry Pournelle’s The Mote in God’s Eye and The Gripping Hand, the character of Horace Bury is a follower of Islam in both books. In the first, he is a very major secondary character, in the second he is one of the major characters. He also progresses through arcs of starting downright villainous to becoming a redeemed protector of humanity and from simply having a heritage of Islam to taking it to heart. The book also mentions a planet I believe called “Leventine”, it is apparently where the Islamic culture settled after the space diaspora and the center of the political and cultural power. There are hints that all was not well between the mainstream empire and Leventine, but that both cultures are in the initial stages of learning to live together. [Thanks to Joe W.]