The Den of Stone by Roger Sandri

Courtney Mays discovers the reason when she comes face to face with a living gargoyle. Her daily life selling appliances is thrown on its head as she learns to live by the sword in a shadow war against monsters. Edthgar, the ancient gargoyle leader, has plotted for centuries, and as Courtney’s abilities grow, so does the threat to his plans. Those she cares about become targets, and she must fight to protect them. Even if it means battling into the heart of their den of stone…