GURPS Bio-Tech is a sourcebook covering medicine and biotechnology through history, in hypothetical future civilizations, and in fantasy settings where magic exists. It is internded for use with the GURPS tabletop roleplaying game, but has considerable material that is not specific to GURPS.
The book also contains outlines of two campaign settings. The first, Alexander Athanatos, is an alternate history in which a clone of Alexander the Great rules a Macedonian Empire that still reigns in 21 CE. The second, Draconis, is a science-fiction setting in which a fleet of generation ships from Earth is settling the Sigma Draconis star system.