Cordelia comes from a long line of magical milliners, who weave alchemy and enchantment into every hat. In Cordelia's world, Making - crafting items such as hats, cloaks, watches, boots and gloves from magical ingredients - is a rare and ancient skill, and only a few special Maker families remain. When Cordelia's father Prospero and his ship, the Jolly Bonnet, are lost at sea during a mission to collect hat ingredients, Cordelia is determined to find him. But Uncle Tiberius and Aunt Ariadne have no time to help the littlest Hatmaker, for an ancient rivalry between the Maker families is threatening to surface. Worse, someone seems to be using Maker magic to start a war. It's up to Cordelia to find out who, and why . . . Featuring illustrations by Paola Escobar.

Cordelia Hatmaker has saved England from war. She stopped Lord Whitloof’s sinister plans, rescued the King and Princess, and restored the Makers Guild. But she still hasn’t found her missing father. Ever since Cordelia discovered the hidden map in her father’s telescope, she’s been searching the streets of London by starlight, trying to uncover its secrets. She never expects to stumble upon a secret society of Mapmakers—or to learn that magic isn’t limited to the few Maker families, but instead is all around, if you know where to look. But danger is lurking around every corner, and Cordelia must convince the rival Maker families to work together for once—not only to bring her father home, but to save the very essence of magic itself... With exceptional and inventive storytelling and a lionhearted heroine, Tamzin Merchant once again draws readers into her captivating London and takes them on a breathless new adventure full of wildness, wit, warmth—and magic.

Return to the spellbinding magical world of the Hatmakers in this sweeping, epic and exciting new adventure on the high seas. Cordelia Hatmaker has finally united the Maker families and restored the kingdom's trust in Maker magic. But mysterious outbreaks of chaotic magic are beginning to happen across London... And then the unthinkable happens. Cordelia is accused of treason. As the guards close in, she must flee London at once. With her father Prospero, and friends Sam and Goose, Cordelia sets sail on her family's ship, the Little Bear, for the adventure of a lifetime. They're determined to solve the mystery of a missing girl, and to clear Cordelia's name once and for all. But soon they are in the dangerous territory of a band of legendary the Troublemakers, captained by a fierce and unstoppable pirate queen...