The Thirteenth Skull (Alfred Kropp Series #3)

First Alfred Kropp lost-and found-the legendary sword Excalibur. Then he defeated King Paimon, arguably the nastiest of the demons to escape when the Seals of Solomon were stolen. What could be left? Plenty, it turns out. Not only is someone out to kill Alfred, but the very people who have sworn to protect him are now trying to use him for deadly means: creating a superhuman army. Trust and betrayal will clash in terrifying ways as Alfred struggles to hold his enemies at bay, even as he learns the full scope of OIPEPs plans for him.