Here's a couple more for you to consider.
Spoiler:I most recently finished the library without resorting to a walkthrough once and all I got was this stupid T-shirt!
I'm with you though. It's past midnight, I'm alone, put my headphones on and had to turn off the game after five minutes or something - might as well have shipped the game with some fresh pair of pants rather than a Latin Bible and an edition of Stoker's Dracula! The historics make this feel a little too.. real. Hey, how about an online petition trying to convince Kheops to do something similar themselves?