Final Justice (Lorne Simpkins, #3)

A ruthless killer returns--and former DI Lorne Simpkins is forced to revisit her ugly past.
After suffering a breakdown and quitting the force, Lorne Simpkins finds herself embroiled in an MI6 covert operation to hunt down her old
enemy, a sadistic and merciless criminal whose ambition is to become the world's richest man.
Lorne tracks the madman through France, attempting to thwart his plans and bring her long-time nemesis to Final Justice.