Dagmar the vampire loves his veggies, but he also enjoys his secret stash of candy, given to him once a year by his undead friends. When he runs out, a little skeleton tells him about Halloween: “But you have to wear a scary costume, I think.” His parents think he’s too little to go trick-or-treating, but he demonstrates his pluck by cobbling together a garlic-bulb costume—but is left to his own vampiric devices when it’s eaten by zombie moths. The humor inherent in the premise wears thin with each plot twist and will likely leave literal-minded young readers scratching their heads where a simpler approach would have been just right. (Picture book. 4-8)