Jack 1939, by Francine Mathews

I really liked this book at first. It's an interesting premise - a fictional, spy thriller novel, with a 22-year-old JFK as the protaganist. It quickly, however, turns into a Jason Bourne book in which it doesn't make much of a difference that Bourne is now JFK, complete with escapes in dumbwaiters. I didn't think much of it, and it got very good reviews.