Ahoy there mateys! I usually love Crichton's books.  This one is laughable and not in a good way.  I listened to this one on audio book.  Started out with interesting premise and interesting dead man.  Then turns insipid. Stupid archeology students travel back in time to "fix" evil corporation's mistakes and save a person and should die like 10,000 times but don't.  Medieval France is a rampaging killing field.  Unlike his other books, the science in this is so beyond silly that it hurts.  The time travel mechanics are lame.  Apparently when I was talking to the First Mate about this one, I used the adjective "stupid" incessantly.  There is a part with a grenade that was foreshadowed so badly that when it happened it was so absurd that all I could do was laugh. It was like reading a bad movie script for an action film.  Supposedly the film is bad too. Arrrr!