This book is about a lieutenant in the Navy, Jacob Keyes who has been functioning as an instructor because of injuries and he has spent time in a cryogenic pod and is now to be tested to see if he is fit for another mission. He is a part of a group who has received intense body enhancements that make them considerably stronger and he is sent on a secret mission. This book is based on the Halo video game and fits into the science fiction category of fantasy. Jacob Keyes is the protagonist and he must prove himself because he is a bit older and does not want to fail. So he takes the hero role upon himself and feels it necessary to fulfill it. The events in this book take on a series of turns and quests with each one as a part of an episodic plot to simply fight and destroy anything and anyone that challenges them. My eleven year old son got this book for Christmas and yet it is clearly for a young adult. I would recommend any high school teenager that plays Halo to get the book to follow along with their gaming.