Book "If Tomorrow Comes 2" by S. Sheldon

The marital happiness of Tracy and her partner in the criminal business, the irresistible "gentleman thief" Jeff Stevens, was short-lived. Their new life, where there is no longer any room for dangerous adventures, seems frivolous and empty to Tracy. But when one day Tracy disappears without a trace, Jeff realizes that he must find and return her at all costs. Even if it means risking his own life and engaging in a duel with the most dangerous people in the world, whom he and Tracy once were