I actually bought this book a day or two after i bought Old Mans War, but for various reasons only got around to reading it on Friday night. I actually finished at about half three on Saturday morning. So a book i did not want to put down, and one i am glad i did not read on a work night!
The story is a return to the universe set up in Old Mans War, with a more detailed look at the Ghost Brigades that were introduced in the first book. While it has a training montage scene, it asks very different questions, wondering about the nature of identity and who we are.
The plot revolves around a member of the special forces who was brought into existence in order to track down a traitor to humanity. He is a clone of that individual, and they have tried to imprint a copy of the traitors memories onto the protagonist. An examination of are we just our memories and choices, or is there something more follows.
After reading Old Mans War i had several questions about why some things were kept secret, and reasons for these are giving in this book.
A good solid follow up to a great book.