There's a current racing ahead, the colour of the darkest blue velvet. We plunge forward. The current is so strong that it crushes me. I'm jolting, juddering, struggling in its grip, but I can't break away. It's got me, like a cat with a bird in its claws. Bestselling British author Helen Dunmore continues her darkly tinged contemporary fantasy of two young people torn between home, family and the dangerously spellbinding undersea world of Ingo. The Tide Knot is the second thrilling instalment in what promises to be a popular, highly praised trilogy. Sapphire, Conor and their mother have moved away from their cozy cottage on ocean cliffs. They've moved away from the memories of their father, who vanished mysteriously in his boat two years ago, and away from the cove that marked their entry to the undersea world of Ingo, home of Faro and Elvira, their Mer friends. But Sapphy can't adjust to her new home; she can't suppress the growing power inside her that's drawing her back to Ingo. Are her bonds to the human world strong enough to hold her on land? Sapphy is even more frightened when she learns that the powerful undersea tide knot is quickly coming undone, the might of the sea about to vanquish the land and everything Sapphy holds dear.