I bought this tiny book when I visited Stonehenge to learn more about the magnificent structure. Wow, there was a lot of geometry involved in creating Stonehenge! Not only there, but other places in England, Scotland, and Wales use the same geometry that (get this) also tell the seasons by a geometric calendar that track eclipses as well as sun and moon patterns! It was truly fascinating to read about! Even though the language (specifically at the beginning) is a bit dry & logical, it was well worth the time taken to discover more about Stonehenge. My only complaint is that the print accompanying the pictures is so small it's hard to read sometimes, so keep a magnifying glass handy when you read it!