Grayscale by Vinni George

Cal Hunter didn’t hate Jack Grayson the moment he met him. He actually kind of liked the arrogant great white shark shifter… until Jack left Cal zip-tied to a bed and stole Cal’s job. Now, every time their paths cross, things get heated, and they both have the scars to prove it.
Jack has always worked better alone, but there is something about Cal he can’t get out of his system. So it shouldn’t be a problem when they are forced to work together to figure out who is after one of the most famous pieces of stolen art in the world.
But both men are keeping secrets that compromise their mission, and when Jack’s life is threatened, Cal has to decide if holding on to his own secrets is worth it. Turns out fate has one hell of a sense of humor.