Here's a fascinating book for your enjoyment.
Zhuk, A.B., The Illustrated Encyclopedia Of Handguns: Pistols And Revolvers Of The World, 1870 To The Present
Greenhill Books, London Stackpole Books, Pennsylvania 1995 304 pages
This is a hugely informative and downright beautiful book. Zhuk's illustrations are not photographs, but line drawings of unbelievable accuracy, detail and artistic draftsmanship. His drawings of intricately engraved guns will take your breath away. And while "the present" stops in 1995, anyone with an interest in the history and development of handguns who is not already a firearms historian will learn a lot.
I've had my copy since 1999, and wouldn't part with it for anything.