An Appointment With Fear by Chad Lee Erway
A dark and sinister force is attacking the people of Wolverton after nightfall. The cops are baffled but the kids of Masterminds Incorporated think there's a special breed of vampire on the loose.
As their list of victims and suspects grows longer, the light of the full moon reveals that vampires may not be their only concern. Masterminds needs to solve this mystery soon or risk becoming victims themselves.