The Bible
The Bible is one hell of a fucking read. Not like the Koran, which is three pages of “for God is Great and the nonbelievers shall perish blah blah blah blibbity blabbity blooh” to get to one sentence of story.
I mean, don’t take any of the God part seriously or anything. You can enjoy Harry Potter and not jump off the roof on a fucking broomstick. Still, worth keeping one around. And free with every hotel.