Lemon Squeezer

Luciano ＂Lou＂ Renaldo was built to disappear, but when he quietly resurfaces, a covert agency called P.I.L.O. realizes something worse than exposure has occurred. Lou hasn’t stolen secrets; he’s mapped the system itself.
Parker Jennings, a sidelined intelligence operative with a personal history she’d rather forget, is drawn back in to assess the damage. What begins as observation becomes pursuit, then collision, as Lou follows a trail east into Russia, where intelligence services are fractured, loyalties are negotiable, and survival has a price.
On trains, in clubs, and under silent surveillance, Lou becomes bait for rival factions. The Russian double agent he seeks turns out to be Maria Grusha, a woman whose value lies in how many systems she can unbalance without being claimed by any of them.
Violence erupts not from strategy, but desperation.
Lou escapes off the map. Parker believes it’s over.
It isn’t.
The final order is simple: follow him, and make sure he stays retired. Permanently.