The Caveman and the Devil — Chris T. Kat

The animals at the Philadelphia Zoo brought zookeepers Paul and Noah together, but now they might tear them apart. When a bloodthirsty lioness stalks her cubs, Noah charges into her enclosure without regard for his own safety. Luckily, a coworker catches his mistake and saves the day. It's not the first time Noah's rushed in on impulse, and he still carries scars from the last time.

Paul can't pretend nothing happened. Frustrated, he tries to comfort Noah, but he can't get past his anger. As head keeper of the big cats, Paul must report the incident and figure out how to keep his reckless lover safe. Somehow he has to make Noah see that his carelessness could cost him his job or his life -- and maybe Paul too.