Neal Stephenson's Crytonomicon. It's not some crappy book about priests bringing the dead back to life.
It's a well written, multi timeline, 1,000 page sci-fi brick. It stretches across the globe, from WWII to a near future where people and industries are building towards more into an intensely more digital life.
A hefty amount of cryptograpghic and ramdomness theory is thrown in as narrative. At one point one of our heroes is bicycling in the Pine Barrens with Alan Turing. He notices that Turning chain pops off periodically. There's a 4 page discussion on the calculus behind the chain popping of. It's backed up by numerous complex formulas. Along the way, you learn stuff about random things that aren't. This should have made me want to stab my eyes out with my reading light, but it was totally engrossing.
Code theory and calulus as entertainment reading !! Who knew?