New for 2025, an epic new romantasy for young adults from the bestselling world of the TWIN CROWNS series.

The swoonful new spin-off to the Sunday Times bestselling YA romantic fantasy series, Twin Crowns.

Bursting with epic adventure, romance and humour on the high seas. Someone is making waves …

PRAISE FOR THE TWIN CROWNS SERIES

‘Twin Crowns cast a spell on me. Don’t miss it!’ – SARAH J MAAS

‘An absolute delight’ – STEPHANIE GARBER

‘Dripping with romance’ – ROSHANI CHOKSHI

‘Pure indulgence’ – GUARDIAN

Captain Marino Pegasi.

Wedded to the sea.

Immune to love.

Until now …

Captain Marino Pegasi is never happier than when he’s exploring the oceans. But when his beloved sister, Celeste, falls gravely ill, he is forced to go on a desperate search for a cure. Little does he know that in his search he will find so much more lying beyond the horizon. Does Marino’s fate truly lie in the hands of a bewitching, mysterious mermaid …?