Tress of the Emerald Sea follows Tress, a quiet girl who lives on a small island surrounded by a magical ocean made of deadly spores. When her friend Charlie is taken away by a powerful sorceress, Tress refuses to accept a life without him and sets out on an extraordinary journey to rescue him.
To reach him, Tress joins a pirate crew and sails across the Emerald Sea, where different types of spores react in dangerous and unpredictable ways when exposed to water or moisture. Along the way, she learns to survive in a world filled with strange magic, shifting loyalties, and unexpected allies.
As Tress grows from an ordinary girl into a resourceful and determined adventurer, she discovers her own strength and ability to shape her destiny. The story blends humour, imagination, and classic fairytale elements with Sanderson’s signature world-building.
Tress of the Emerald Sea is widely regarded in modern fantasy fiction. It is ideal for readers who enjoy imaginative worlds, uplifting adventures, and strong character growth, offering a charming and creative tale of bravery, love, and transformation.