The filth licker - Cristy Burne

Miku is going to School Camp in the forest, with her friend Cait and the rest of her class. It should be fun. But Miku has premonitions of danger, and when Oscar goes down with a festering rash, and a rushing wind blows out the bonfire she's sure something bad is going on. Then Alex finds the frog-like Filth-Licker in the boys' toilets, and all at once Miku, Cait and Alex are on a secret mission to overcome the vengeful Shape-Shifters or Super Demons before it's too late?
Later that night, with Alex kidnapped by a pyromaniac fox, and Cait possessed by some angry sickle weasels, it's up to Miku and the Filth-Licker to save them all from disaster.