Purpose By Accident, Book 6 in Cocker Brothers, Jeremy Cocker:

A Military Romance to bring him home...
With his time served in the Marines, Jeremy is a man now - one with ghosts as company and a dog that keeps him sane. Since his return, his brothers, even Jake - his best friend - can't reach him. But when a budding, female chef barrels into his life and doesn't take his sh*t, the two of them find that smiling isn't so hard anymore. Is there really such a thing as an 'accident'