Liars & Thieves by Stephen Coonts

Lots of fun, look forward to hearing the next one. PW Tommy Carmelliniis sent to post guard duty at a farmhouse in Virginia's remote Blue Ridge Mountains, where top government operatives are debriefing a star defector: the ultimate KGB insider, a man with records on every operation and every dirty trick the shadowy intelligence agency has ever run, from Lenin to Putin. Carmellini arrives to find the guards shot dead, and a ruthless team of commandos - American commandos - slaughtering everyone in sight, then setting the house on fire. He escapes a hail of bullets and a deadly mountain car chase with what seems to be the sole survivor, a beautiful and mysterious translator who steals his car and leaves him for dead at the first chance.