The Disappearance is the second chapter book in the series. It is a novelisation of Issue 002: The Twelve Portals and adapted by Elizabeth Lenhard. It was first published in 2004 and is available as an audiobook read by Blaze Berdahl.
Will, Irma, Taranee, Cornelia, and Hay Lin are getting used to having powers. But trying to manage their magic is tricky. Irma may have caused one of the boys at school to disappear with a spell! And there is another development that is even more puzzling. Their friend Elyon has vanished without a trace, and her house has been abandoned. The girls set off to find out what happened - and along the way discover a dark secret that surprises them all.