 For fans of old school and classic science fiction, this book is very refreshing. It's a throwback to the kinds of worlds and stories we used to see specifically in Heinlein, except Better Written. It's about a near future world where people who have reached the end of their lives have the option of renewing their bodies in exchange for a stint with the space military. You see, that's very Heinlein. Whether you like or agree with the kind of world that this story is set in, it's very well written, it's a very easy read, and it's about the characters, so pick it up and enjoy it.