It's Martin Gardner's autobiography. It's about his life. It's not about logic puzzles, tricks with matchsticks, or computer simulations. Those are things he wrote about. His autobiography is about the life that happened in between writing articles. There's academic politics, writing some not-so-interesting articles before stumbling into recreational mathematics, meeting magicians and others which would eventually lead to material. Through it all, Gardner's curiosity shines through, along with his ability to find a diamond of interesting-ness in a rough of noise.