Zombillenium, Vols. 1-2 (Gretchen/Human Resources)

Francis von Bloodt, a vampire and family man, manages the theme park Zombillenium. They don't just hire anyone at Zombillenium: mere mortals need not apply. The park works only with genuine werewolves, vampires, and zombies. This is what Aurelian discovers when he, deceived by his wife, gets hired in spite of himself. Gretchen, a plucky trainee witch, helps him get around. But soon, tempers start to flare. Things get particularly ugly when the park's security is breached from two sides: activists and a very strange visitor—a mom to two peculiar sons that the head of the park seems to remember from somewhere. Gretchen and Aurelian do their best to help save a precarious and explosive situation!