Ghouls in school - Roger Hurn

Somebody is playing practical jokes at the Spook Squad's school and the Spook Squad are getting the blame!
When a bucketful of cold water lands on the Head Teacher's head, the girls swing into action. If they don't catch the culprits they'll be in hot water! But their problems really begin when they discover that the jokers are a couple of ghouls who think they're too cool for school!What's that noise? Don't worry, the Spook Squad will protect you! Follow Emma, Nita, Roxy and Leena as they help to save the humans in their town from ghouls, ghosties and things that go bump in the night. Part of a gripping - and amusing - series, this book will thrill and engage all readers who love just a little bit of a scare.