When her parents send her to stay with a grandmother she hardly knows for the summer, Elen is furious. Gran lives on a tiny island and doesn't want her either - it's not an easy start. Gran's idea of childcare is to give Elen a map and tell her to explore. Who is the odd boy on the beach with a puffin? After saving Gran in a storm, Elen finds a picture that she's sure is a clue to hidden treasure. She investigates - and finds a very different treasure from the one she expected.

Eloise grew up in Llantrisant. She now lives in Saundersfoot, Pembrokeshire, very close to the beach where she collects sea glass and walks her dog Watson Jones. She worked in the theatre inwardrobe, then studied Drama and took a postgraduate diploma in Acting. After working for over ten years as an actress, she studied for a Masters in Creative Writing at Swansea University. Elen's Island is her first book.

When Elen is sent to stay with her gran on a remote Welsh island for the summer she is furious. But then she finds a friend, a puffin and a treasure map and the holidays start to look up.