I'm a big history and science buff, so this book was everything I wanted. It didn't get 5 stars because it seemed to get rushed at the ending. The first half or third were very slow, but enjoyable. As soon as the last 150 pages rolled around, the pace was very fast. It wasn't so fast that you missed somethings, but it was a little fast for my liking. Still a good book if you like history and adventure.