Witch: The Crystal Birds 1 The Stone Falcon

The first volume in the Witch series, The Crystal Birds 1: The Stone Falcon by Lene Kaaberbøl. The book follows the five friends Will, Irma, Taranee, Cornelia and Hay Lin, who discover they are magical beings and must learn to use their powers together to save the world. In this book they meet The Stone Falcon, a malevolent creature that threatens their power.