The illustrations are beautiful and were the first to capture Robotson's attention. He liked the different masks that Native Americans and Africans used in their dances to the gods. He also seemed really interested in the Hindu gods. I was delighted to see that because of a recommendation for The Little Book of Hindu Deities that I got from Rolfe Schmidt, a secular homeschooling blog. I think that will be a fun one to check out next. What I liked most about this book was the history and evolution of human belief systems. It starts out by explaining that humans didn't understand the world around them, so they made invisible beings responsible. At first there were many of them, but over time as we understood more about the world around us, we gravitated to monotheism. I'm not sure Robotson picked up on just how recent this change really is. I was very glad to see it put into context. The end of the book explains that not everyone is religious and how important it is to realize that there are many belief systems. It's more important to try to find our common ground than to try highlight the differences. The golden rule is the stated underlying theme in all religions, and there are quotes from each in the back of the book.
As to the charge of the book focusing more on Buddhism, there was probably more information on this but it is one of the oldest belief systems, and one of the nicest. I think the problem most people had with the book was that it was mentioned twice how Buddhists don't talk about God or gods. Why they are practically atheists! I'd take Buddhism over any others in a heartbeat, thank you very much.
So I would recommend this to parents who want to introduce the major religions to their children. If you want them to have a history and understanding of other beliefs, this is the place to start for sure. I really think it's presented in such a way that if they are paying enough attention, the message is religion was started by human to explain the unexplainable. It evolved over time but it's still man-made.