It's an interesting book. I like the premise and don't like the delivery. The main suggestion is to start questioning the world as a way to creative thinking. The author doesn't offer much himself, but has a couple of good references to other people's work.
The majority of the book is a collection of cherry picked success stories from history. It's a typical over simplification of reality twisted to fit the book's narative. It's fun and inspiring to read but has no practical value.