Unicorn Quest

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 Windemere Manor ... until the sisters climb a strange ladder in a fireplace and enter the magical land of Arden.

There, they find a world in turmoil. The four guilds of magic no longer trust each other. The beloved unicorns have disappeared, and...