Sibéal Pounder is a #1 New York Times bestselling author of the much-loved and highly successful children's fiction series Witch Wars, Bad Mermaids and Neon's Secret UNIverse, and the Christmas hit Tinsel. She has also written Beyond Platform 13, the sequel to The Secret of Platform 13 by Eva Ibbotson, and the novelisation of the film Wonka. Her World Book Day book Bad Mermaids Meet the Witches was a Sunday Times bestseller, and Witch Wars was shortlisted for the Waterstones Children's Book Prize and the Sainsbury's Children's Book Award.

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'You'll laugh your tail off' - Rob Biddulph
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The third book in the hilarious Bad Mermaids series for kids aged 7+, from the bestselling author of Witch Wars
In the kingdom of Frostopia, mermaids Beattie, Mimi and Zelda have come to the aid of Maritza Mist, a famous water witch who supplies magic spells to the underwater kingdoms.
Two notoriously bad mermaids have escaped from Viper View prison and stolen Maritza's map that shows the locations of twelve magical objects. When brought together, these objects will create the most powerful water witch the world has ever known. Beattie, Mimi and Zelda set off to travel the underwater kingdoms to stop them. But they haven't counted on meeting a bunch of over-zealous spies, the oldest shark in the world or their faithful companion Steve the seahorse going rogue ...