Book about history and religion?

The heathen's guide to world religions. Get the real dope on these guys.

Books like this are often a good way to start as they're a good way at getting a general look at each one, before perhaps going off into more detail. And they usually have lots of cool pictures. ☺

Be careful doing this if you want to stay a Muslim. I lost my Christian faith after I read extensively about the history of it.. Mind you, I'm perfectly happy about that. :)

Find one that does not ride side saddle with an army in those history searches

CS Lewis wrote good ones.

Google it