The best book I have read so far, but keep in mind that this book describes not triz only but a whole process of a solution finding. If you want more triz maybe start with this one then look elsewhere.
I have read several books on TRIZ. After reading the impressive reviews on the U.S. Amazon site I decided to buy "yet another" TRIZ book. I'm so glad I did. This is the best book on TRIZ I have read bar none! It describes clearly and logically all the individual tools of TRIZ and then provides a simple system for how to use the various TRIZ tools in order, depending the type of problem you are trying to solve. Fantastic, I wish I had bought this book first.