Simple Genius by David Baldacci (2007)

Needing to get my mind off my tenure folder, this was another of my escapism books. We see Michelle Maxwell lose it, pick a fight with a big guy in a bar, and almost kill him. She ends in a psych hospital - and she is definitely not a talking therapy kind a gal. She ends up reluctantly talking to a psychiatris and solving a problem at the psych place. But she really just wants to get back out working with Sean King. Sean is down and out financially, so he takes a job through and old flame Joan, which lands him in a super-secret think tank, which is right next door to a CIA facility. A couple of people have lost their lives, so he investigates and gets involved with much larger issues.