Alfred Kropp, The Thirteenth Skull

First Alfred Kropp lost-and found-the legendary sword Excalibur. Then he defeated King Paimon, arguably the nastiest of demons ever to roam the earth. What could possibly be in store for him now? Plenty, it turns out. Not only is a dangerous new enemy tracking Alfred's every move, even the people who have sworn to protect him no longer seem trustworthy. Who, or what, is Sofia, and is there a connection between Sofia and the mysterious Thirteenth Skull? As Alfred struggles to hold his enemies at ...