Welcome to Chillsville Elementary (1) (Ghoul School)

Twins Adam and Sophie Blake think everything about their new school is creepy.... The other kids have strange names--like Frank N. Stein and Berta Graves--and their new teacher, Ms. Wolf, gives science lessons about killer ants and bats. Not to mention, the class pet is a huge, hairy spider! But their old school was never this exciting...

Just as the twins begin to think Chillsville Elementary is a cool school, they start to see spooky shadows and hear howling in the school's empty tower. Soon Adam and Sophie start to wonder if it is really a ghoul school?