Two brothers, one serum, and a world of trouble!
Author Ali Sparkes and Illustrator Ross Collins
7+ boys and girls who love creepy-crawlies and good adventure stories.
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Josh and Danny become involved in another of Petty Potts's mad schemes to try out her S.W.I.T.C.H formula. Soon the boys are beetling about in a pond, breathing underwater, and creating the most almighty stench to scare off predators.
But pond life is the least of their problems. A mysterious stranger is hanging around and he's out to get them.
This page was last updated on 15 October 2017 at 04:30 GMT