An enthralling new fantasy series about a girl searching for her sister in a land full of magic and strange creatures.

Claire Martinson still worries about her older sister Sophie, who battled a mysterious illness last year. But things are almost normal as they move into Windermere Manor . . . until the sisters climb a strange ladder in a fireplace and enter a magical land. Arden is a world in turmoil. The four guilds of magic no longer trust each other. The beloved unicorns have gone, and terrible wraiths roam freely. Scared, the girls return home. But when Sophie vanishes, it will take all of Claire's courage to climb back up the ladder, find her sister, and uncover the unicorns' greatest secret.
Blending the timeless feel of The Last Unicorn with Frozen’s powerful themes of identity and sisterhood, this first installment assembles a lushly magical world and sets the stage for many adventures to come.