What a wonderful book. Even if you have no intention of creating in paper-mache, I would recommend this book for it's wit and charm. Dan is clearly a man who has no interest in growing up and who delights in sharing his messy fun with others. His philosphy that making monsters is a great way to start for kids, because no one can say "you did it wrong", also reflects his undertanding of children and his great heart.
From a practical standpoint, this book also is full of information and techniques outside the normal field of knowledge about paper-mache, in other words he shares a lot of really cool tricks to making wonderful monsters.
So you will have fun from the moment you open the book until you put the finishing touches our your creation.