A short, easy to understand book, but with some very good tips. Excellent book for a beginner or intermediate level player to learn more about poker, it has definitely improved my play, and from that perspective, it pays for itself.
All 52 tips are short, just a couple of pages, and so are free from waffle and just get to the point. Nothing complicated, just some basic probability, and there should be something in here that any player can take and improve from.