A Witch's Thief (Thieves and Lovers #3)

Book 3 in the Thieves and Lovers series.

The witch...

Isobel's magic and immortality are being held hostage by Falcon Montague (aka Robin Hood). Only if she persuades her imprisoned former lover, Lancelot Fridwulf, to return to Falcon's employment will he reinstate her powers. But Lance has sworn off a life of crime. When Isobel makes conflicting pacts with several men she becomes entangled in her own web, for death will be her fate if her powers aren't restored within a fortnight.

The thief..

Now that Lance has been released after a horrific year in a dank cell, he vows to become a law-abiding citizen. But he walks straight into the arms of the beautiful witch Isobel, who begs him to steal her bauble back from his old friend, Falcon. In exchange, she and Nikolai-both Lance's former lovers-will enjoy a triad reunion of untold passion. Still, things are not as simple as they seem. Danger, debauchery and deceit are certain to put Lance back behind bars...this time for life.