4.0

This was really good. It's a very quick read and rather inspiring, but some historical inaccuracies bugged me (Columbus was from Genoa, not Portugal, though he was no doubt fluent in Portuguese) but overall it was a good book. I want to read it again. Kind of surprised I didn't read it when it came out 10 years ago, but I don't think I was ready for it at that point in my life.