The children of Mivtown have grown up hearing the legend of the monsters of the loch. But it's only a story - a warning to stay away from the water.
Then strange things start happening in the village. Effie's rabbit Buster escapes from a locked hutch, her mum disappears without trace and slugs start to infest her home.
Along with her best friend Finn, Effie begins to hunt for clues to solve the mysteries of Mivtown. Could this all be connected to the legend? Is it really just a story or is there something lurking in those deep, dark waters?
Polly used to be a primary school teacher in London and while she was teaching there she used to get up very early in the morning to write stories. The first of those stories is now a book called Boy in the Tower.
She's still writing stories and though she doesn't teach now, she still visit schools ... only now they're all over the country.
She lives in Bri