As an attendee of the Under 20 Summit hosted by the Thiel Foundation, I was introduced to Zero to One by Peter Thiel. This is hands-down my favorite startup book. It's very insightful and thought-provoking. Peter is famous for his controversial insights, and this book has some amazing thoughts that I've spent many hours mulling over. I like to think that contrarian thinking is intuitive for me. I try to visualize the path that people aren't taking, and figure out what drives their decisions to do so. To translate the contrarian question to business, what great company noone is building?