Sum

How far would you go to save the only person you've ever known?
Matt listens to heavy metal and really enjoys a good idiom. He's also the most sophisticated AI the world has ever seen.
After the death of his beloved creator, Dr. Elizabeth Davis, Matt finds a hand-written note which changes everything. What is the mysterious Event Zero, and how does it tie Matt to events centuries earlier?
Obsessed with questions of his origin, Matt can't be satisfied until he goes back in time to learn what Event Zero really is. But can he move through time without messing things up? Can he find the truth and possibly rewrite Dr. Davis's history to save her?