ooh ooh!
Read The Religion by Tim Willocks... tis chuffing marvellous book to get lost in. great big fat chunky tome...
it covers: the history of the siege of malta during the crusades and a very personal quest to find a missing boy. there's action, love story, friendship, bucketloads of history and history of religion, a bit of science/medical history, bits about the inquisition, tons about the various cultures/beliefs of the different warring factions (and there are many!), quite gory in places and quite bodice-ripperish in others.
the writer is a psychologist (think he used to be Madonna's shrink at some point or other, but don't let that put you off!). but, Willocks knows how to write a page-turner and there's no dumbed-down language, because he seems to really enjoy sharing gritty little details and weird, but interesting facts.
i also loved Pillars of the Earth (for bizarre subject matter) by Ken Follett. It's about building cathedrals in the middle ages! but, it's about a lot of other things too, just a fascinating core subject that i really enjoyed learning about.
I just finished reading The Testament of Jessie Lamb, which makes me want to shout, alot, and very loudly. It's won the Arthur C Clarke award recently and is broadly comparable to the Handmaid's Tale.