I wish I was away in Ingo, Far across the sea, Sailing over the deepest waters, Where love nor care can trouble me... Sapphire's father mysteriously vanishes into the waves off the Cornwall coast where her family has always lived. She misses him terribly, and she longs to hear his spellbinding tales about the Mer, who live in the underwater kingdom of Ingo. Perhaps that is why she imagines herself being pulled like a magnet toward the sea. But when her brother, Conor, starts disappearing for hours on end, Sapphy starts to believe she might not be the only one who hears the call of the ocean.

I can't go back in the house. I'm restless, prickling all over. The wind hits me like slaps from huge invisible hands. But it's not the wind that worries me. It's something else, beyond the storm... Sapphire and her brother Conor can't forget their adventures in Ingo, the mysterious world beneath the sea. They long to see their Mer friends once more. But a crisis is brewing far below the ocean's surface, where Saldowr, the wisest of the Mer, guards the Tide Knot. And soon both Sapphire and Conor will be drawn into Ingo's troubled waters.

The third spellbinding story about Sapphy and Conor's adventures in the powerful and dangerous underwater world of Ingo. A devastating flood has torn through the worlds of Air and Ingo, and now, deep in the ocean, a monster is stirring. Mer legend says that only those with dual blood—half Mer, half human—can overcome the Kraken. Sapphy must return to the Deep, with the help of her friend the whale, and face this terrifying creature—and her brother Conor and Mer friend Faro will not let her go alone!

No human has ever made the Crossing of Ingo - the most dangerous journey young Mer have to face. Sapphy and Conor have been chosen for this epic challenge, and the future of both Air and Ingo depends on their success. But Ervys, his followers and new recruits, the sharks, are determined to stop them - dead or alive...

An atmospheric and beautifully written adventure, from the award-winning author of INGO. Morveren lives with her parents and twin sister Jenna on an island off the coast of Cornwall - an island that in the long distant past was devastated by a tidal wave, its halls and people lost. Only some of those taken by the sea may not have been lost at all! Now, as Morveren and Jenna's relationship shifts and changes, like driftwood on the tide, Morveren finds a beautiful teenage boy in a rock pool after a storm. Going to his rescue, she is shocked to see that he is not human but a Mer boy. With Jenna refusing to face the truth, Morveren finds herself alone at the worst possible time. Because when the worlds of Air and Mer meet, the consequences can be terrible!