The Deep
Sapphire lives in two worlds. On land she walks the rocky shores of the Cornwall coast — but under the sea she can swim like a seal by the side of her Mer friend Faro.
Now both of Sapphy's worlds are threatened. In the profound depths of the ocean, where the Mer cannot go, a monster called the Kraken is stirring. He has the power to sweep Ingo away and shake the land from its foundation.
Because of her mixed blood, Sapphire can enter the Deep. With a great whale as her guide, she will journey to a place so far from the sun, no light can find it — and confront an evil that's even darker.
Readers also enjoyed
Helen Dunmore
Helen Dunmore FRSL (1952-2017) was a British poet, novelist and children's writer.
Dunmore was born in Beverley, Yorkshire, in 1952, the second of four children of Betty (née Smith) and Maurice Dunmore. She studied English at York University, and lived in Finland for two years (1973–75) and worked as a teacher. She lived after that in Bristol. Dunmore was a Fellow of the Royal Society of Literature (FRSL). Some of Dunmore's children's books are included in reading schemes for use in schools.
In 2017, she published her last book, Birdcage Walk, before writing an article about mortality for The Guardian after she was diagnosed with terminal cancer. Her death was announced on 5 June 2017.
Ingo
Ingo consists of five books. The current recommended reading order for the series is provided below.

