If you like stories that mix adventure and historical fiction, you will find Brother XII's Treasure to be a very quick and enjoyable read. The book had a little bit of a slow start because all seven characters were introduced in great detail. But after the story really got started, I was pulled into the action and couldn't put it down. Author Amanda Spottiswoode created very realistic, interesting characters. As a result, I was caught up in their adventures and rooting for them when things got tough. She also described the ship, scenery, and people they met in such detail that I left like I was watching a movie of the book as I read it. Overall, the plot of the book was good, with enough suspense to keep me reading, and a satisfying ending. However, I believe the book would have been better with fewer characters. There were a lot of them to keep track of, and the first few chapters were mainly devoted to introducing all of them. I think that this book is great for late elementary students to early middle school students. Overall this book was a great read!