Claire Martinson and her sister Sophie have decided to stay in Arden - the magical land they discovered by climbing up a chimney in their great-aunt's manor. If what they've learned is true, the sisters are the last descendants of the royal family, and only a true heir of Arden - with magic in her blood - can awaken the unicorns.  

An enchanting, exciting fantasy about a real-world girl searching for her sister in a land full of magic and strange creatures, blending the timeless feel of A Wrinkle in Time with Frozen’s powerful themes of identity, enchantment, and sisterhood. Claire Martinson still worries about her older sister Sophie, who battled a mysterious illness last year. But things are back to normal as they move into Windermere Manor...until the sisters climb a strange ladder in a fireplace and enter the magical land of Arden.

Ellie is a rebellious princess hiding her real identity. Lottie is her Portman, acting as the princess for the public to shield Ellie from scrutiny. Jamie is Ellie's Partizan, a lifelong bodyguard sworn to protect the princess at any cost. Together they are attempting to stay safe from Leviathan, a group determined to take the princess for unknown reasons. When Leviathan force them to travel to their beloved Rosewood Hall's sister school in Japan, the threesome find that nowhere is beyond Leviathan's long reach.

Sophie Foster doesn’t know what - or whom - to believe. And in a game with this many players, the worst mistake can be focusing on the wrong threat. But when the Neverseen prove that Sophie’s far more vulnerable than she ever imagined, she realizes it’s time to change the rules. Her powerful abilities can only protect her so far. To face down ruthless enemies, she must learn to fight.

Sophie Foster is back in the Lost Cities - but the Lost Cities have changed. The threat of war hangs heavy over her glittering world, and the Neverseen are wreaking havoc. The lines between friend and enemy have blurred, and Sophie is unsure whom to trust. But when she’s warned that the people she loves most will be the next victims, she knows she has to act. A mysterious symbol could be the key - if only she knew how to translate it. Every new clue seems to lead deeper into her world’s underbelly and the Black Swans aren’t the only ones who have plans.