The underwater world of Ingo is once again brought to life in this spellbinding sequel. Sapphy, Conor and their mum have moved away from the cottage by the cove, away from the memories of their father. But Sapphy can’t adjust to her new life and is increasingly drawn back to Ingo and to her Mer friend, Faro. Now the undersea world is becoming more dangerous, and as its power grows, both Sapphy and Conor are called to its depths to take on the might of Ingo’s tides.

There is a legend in Cornwall of a man who fell in love with a mermaid, a man who swam down into the sea one night and met his Mer love. He was never seen again. Sapphire knows the legend well. Her father disappeared at sea, and now her brother, Conor, keeps vanishing by the shore, too. Sapphy also feels the inexorable lure of the ocean, a temptation that reveals the truth of the legend and opens a beautiful world beneath the waves: the enchanted, undersea realm known as Ingo. But there’s a dark and dangerous side to Ingo, and Sapphy must face its power or lose touch with everything—and everyone—she loves on land.

Quirky, charming, informative, unique -- two Cambridge physicists reveal the myriad ways to tie a tie.

In a seaside town of sandy beaches and ocean breezes, Sapphy has never felt so far from the sea. The crowded shore at St. Pirans is nothing like the cove at Sapphy's old home, where she first found her way into the underwater world of Ingo. But Ingo's pull is strong, and it always finds a way. Soon Sapphy and her brother, Conor, are swimming beneath the waves again, riding the currents and teasing their Mer friend Faro. As Sapphy goes deeper into Ingo, she learns to feel more at home in the sea—even as she begins to be aware of its dangers. There's the danger of going in too deep, and breaking the delicate balance between Sapphy's life on land and her life in Ingo. There's the mysterious disappearance of Sapphy's father, an experienced sailor who should never have drowned. And then there's Ingo itself—a restless power as old as the world, as strong as the tides, and more dangerous than anything Sapphy has ever known.