The philosophy it espouses is very similar to Zen. Unfortunately my copy ewas badly scanned by as I believe it was a Guttenburg edition so parts were unreadable.

But besides that the authors complete black of nbacking up their argument with any evidence other than his own convictions is very similar to what I found in other older books like Candide. Very irritating. I also found it dull but that could be because I read nothing new or fresh in it. I've heard it before but via different sources (e.g. Buddhist writings which are very similar)