The Kraken Project, by Douglas Preston

This was a strange book.  The heroes don't get much development.  One is Shepherd, a genius programer who built an AI system for NASA; it went nuts and escaped.  Shepherd runs too.  Another is Ford, who is a former CIA agent, and works for the President who oddly enough bothers himself worrying about finding Shepherd.   There may be more character development of the software program, Dorothy, than of the human characters.   In spite of all this, I enjoyed the book.

The Kraken Project (Wyman Ford Series)