Deadly Passion by Amanda Pillar

Can two assassins outwit each other to claim the ultimate prize?

Dru is a blood-bound assassin, tied to Hell and her master for eternity — okay, not ‘eternity’, but it sure as Hell feels like it. She’s got a slight attitude problem, a strict no-touching rule and she has claws and knows how to use them. She’s also willing to earn her freedom at any cost, even if that means stealing from an angel.
Azrael was once a member of an elite unit in Heaven’s army, but after a priceless artifact was stolen on his watch, he was thrown out of Heaven. Now the fallen angel is on a mission: find Heaven’s Heart, save his missing comrades, and get even with the angel who took his wings.

The first time Azrael and Dru meet, she leaves him for dead. The second time, they’re tasked with the same mission — retrieve Odin’s Orb. Will their sparking passion derail their best-laid plans? Or will they play for keeps?