Jessica Ennis-Hill grew up in Sheffield with her parents and younger sister. She was introduced to athletics by her parents and turned pro in 2005.

She has been World and European heptathlon champion and won gold at the London 2012 Olympics and silver at Rio 2016. She still lives and runs in Sheffield and enjoys reading stories to her son every night.

Elen Caldecott graduated with an MA in Writing for Young People from Bath Spa University and was highly commended in the PFD Prize for Most Promising Writer for Young People.

Before becoming a writer, she was an archaeologist, a nurse, a theatre usher and a museum security guard. Elen's debut novel, How Kirsty Jenkins Stole the Elephant, was shortlisted for the Waterstone's Children's Prize and longlisted for the 2010 Carnegie Medal.

Erica is no stranger to sea faring adventures! When she was a little girl, her father, a former Merchant Navy Officer would tell her 'ship stories' about water spouts, sharks and mountainous waves.

Inside Erica's six-year-old imagination, these stories soon included fairies that lived under the sea, mermaids, curious sea beasties and gigantic ocean dwelling monsters.

She spent her childhood exploring the rock pools of the rugged and wild coast of Northern Ireland, but now lives far, far away from the sea so contents herself by writing about it instead.