Stephen Hawking's Universe (original 1985; edition 1989)

Boslough's book is a little bit biographical, a lot more scientific, mathematical and theoretical and way outdated. Of course, when it was written 27 years ago the information was probably relatively current but now some readers may be familiar with most, if not all of the concepts presented. However, it is a great refresher read for people who don't delve into these subjects on a daily basis. ( )