What is a good geometry book for someone who knows very little to nothing about geometry. I know nothing about geometry because I never finished high school:( . What is a good book that starts from the ground up covering the very basics and goes to a reasonably advanced level? I'm looking for something that is easy to read since this is for self study. Should I just pick up any cheap book on ebay that explains high school geometry or is there some particular good book out there that is worth reading?