The authors are so eager to be funny and serious, they end up failing on both counts. Facts and jokes are delivered much the same way, making the book prone to misunderstandings. Particularly if you aren't already familiar with Dutch culture.
If you want to learn about the Dutch and get to understand them better, read "Dealing with the Dutch" by Vossestein or "The Low Sky" by Van der Horst. For a really funny read, go with "Xenophobe's Guide to the Dutch" by Bolt.

Most books on cultural stereotypes try to be funny. Often jokes work only for those already in the know, or worse, they are misleading to those who aren't.
Aimed at expats and others working with the Dutch, Mr Vossestein has written a serious book. The goal is to inform, not to get cheap laughs (though many of the anecdotes from foreigners interacting with the Dutch are quite entertaining).
Perhaps the greatest value of this book is as a mirror for Dutch travelling abroad. After all, understanding other people's culture starts with understanding your own. This book should be compulsory reading for all Dutch expats.