This book is very artistic and creative. For me, personally, I don't think it is anything more than a pretty picture book for kids. It is more of a grown up view into a kids world and how they see things innocently. I like that, and I like the message as an adult, but just as the book points out, little kids are too innocent to see the message.
If the book is targeted at adults, then I say more power to you. Great message. The only challenge there is that the book reads in about 2 minutes. For adults, it is more of an extended cartoon.