This is not a bad book. However, I was disappointed because I guess I misunderstood what "simple yet thorough" meant. This is very simple; it is for 4-8 year olds and they mean it. I didn't learn a whole lot and that's a lot of money to pay for a simple book. I don't believe this is a complete list of holidays. There is no month listed for the holiday! There was no explanation of the Jewish calendar and of how they calculate years. I'm pretty sure there was not an activity for each holiday, which was a big minus (I borrowed this from the library). (Side note: if your child has food allergies, you would end up with not many activities to do at all.) So instead of billing this as an activity-filled "thorough" book, I would say it would probably be a nice read-aloud to your child. You could probably find the same information online (which is what I plan to do with my children).