Two brothers, one serum, and a world of trouble!
Author Ali Sparkes and Illustrator Ross Collins
7+ boys and girls who love fun adventure stories
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Petty Potts, scientist extraordinaire, is losing her touch. The spray that's supposed to SWITCH Josh and Danny into chameleons refuses to work.
But the next day, at school, things get VERY weird. Looks like Petty's spray has worked after all. And it shows no sign of wearing off any time soon . . .
This page was last updated on 22 October 2017 at 04:30 GMT