I picked this book because I like reading about time traveling. Some exciting moments in this book where when Tycho sees himself from the past and the futures. It is exciting to read about what he has become in the futures he goes to, and each one is bad. I'ld recommend this book to people that want a sci-fi book that doesn't take along time to read and for people that like time traveling books. Tycho has a great adventure. You should read it.