After two excellent books, Christensen decides to try and write a third one (with new co-authors). Like the first two, it is a very interesting journey we embark upon (reader and authors alike), but this time, the fresheness isn't as pronounced, and the endless repetitions combined with the snails pace, makes it a nearly painful experience to go through.

Misunderstand me right, this is still a very good book, but after having gone through the two former books, this feels like preaching to the converted.

If you haven't read anything from Christensen, this could be a introduction, even though it is extremely boring. If you have read his other two books in the series, you can read the first two chapters and get the gist about what he will come to for conclusions easily.