Maybe - John Locke

Maybe is book nine in the Donovan Creed series.

When a domestic terrorist decides to melt the faces off of mothers and babies the president (yes that one) calls Donovan for help. Along the way, Donovan helps his daughter take after himself. It's a little scary since Donovan is an assassin. The whole thing is a little scary, and a little funny, but that's Donovan. Very highly recommended.