Josh and Danny are at the zoo with Petty Potts to try out an amazing spray that can turn them into anacondas! But when Petty wanders off, the twins soon realise that, as two snakes on the loose, they are in danger of being put in a cage with other anacondas. And when they SWITCH back into boys they turn into a tasty snake snack!

Josh and Danny have gone for a nice day out at the zoo. Or, should that be, a nice, experimental, day out at the zoo? Petty's developed a new SWITCH spray for snakes! And Josh and Danny are willing volunteers. Things start to go a bit wrong though when they fail to SWITCH back into boys, and are spotted by a whole class of girls on a school trip! Luckily, Charlie, an old friend from summer camp, is there to help, and the panic subsides. The trouble is not over yet

though . . .

Praise for SWITCH

This book has helped my son, 5, move on from picture books at bed time to one with more words. An excellent choice for reluctant readers who will be thrilled at the idea of turning into a bug, mad inventors and lots of adventures.

The book is great fun and involves the reader, who really feels as though they are part of the story. Along the way the reader learns a surprising amount about pond life.

Praise for Ali Sparkes's Frozen in Time, winner of the Blue Peter Book of the Year Award

'I know now what they mean by a plot that is toe-curlingly good . . . brilliantly inventive and rollicking fantastical adventure'

'Frozen in Time shows [Ali's] skill at fusing traditional children's storytelling with modern tales . . . Sparkes's sci-fi conspiracy thrills will keep 21st-century kids transfixed'

'It was outstanding. It blew me away'