This is the second in The Chronos Files - a series about time travelers gone bad, or historians who can time travel and are tempted to change history. I read this because I liked book one. I don't know if it's too long since I read book one, or what, but I didn't really love this one. Too much of the story was bogged down in navel gazing and over-thinking every move. The story does regain some of its rhythm toward the end and there's a decent cliff hanger, so I probably will go ahead and read the third one.