Riley's Regret

Hawk shifter Colin has been mentoring Eagle shifter Riley for several months now. Because Eagle shifters are so rare, Riley is constantly in danger of being captured and forced into slavery, so Colin has his hands full with training Riley to be a halfway decent soldier, protecting the younger man from their enemies and trying to fight the growing attraction they have for one another. Then Colin discovers a bigger threat to Riley, more dangerous than all the others. Riley can't run away from this threat since it comes from within him. Will Colin be able to save Riley from himself, or will the Eagle be lost to his own internal demons?