I enjoyed this book as a read and, having never read its kind before, took away a few valuable lessons. However it was fairly clear that the writer, despite holding a PhD, didn't approach his project very professionally. The book kicks off very engagingly but really peters out by the end. There are seven main chapters and they seem to get shorter and less well written as the book goes on. The truly rubbish 'exam' at the end has clearly never been proofed, with the same stupid copy-and-paste error appearing at least six times. Without the illustrations and the large type, this book is probably only about 50 pages long. For a creativity trainer, Von Oech surprisingly quickly runs out of steam when it comes to conveying his ideas. Ultimately, apart from some fairly dull-sounding corporate workshops, there is little indication that his ideas do much to make him more creative. So it's questionable that they will do much for anyone else.