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How To Solve It by George Polya - Good book with math stuff

Sophie's World by Jostein Gaarder - A book about philosophy and a tour through a ton of it, has a good story and good lessons.

Wheel of Time Series by Robert Jordan - Long series, I've only read a couple but it's really good

Alex's Adventures in Numberland by Alex Bellos - A fun book on math, it takes a less traditional approach and goes at it as if he were an investigative journalist (Because that was his job while writing it). It's really interesting even if you don't like math.

Surely You're Joking, Mr. Feynman! by Richard Feynman - A series of short stories from the life of the american physicist Richard Feynman, it's pretty interesting, and it isn't as boring as you would think.

Sherlock Holmes Stories by Arthur Conan Doyle - I've been reading these recently, pretty fun.