The Power of Five (W.I.T.C.H. Chapter Books #1)

Will is new to Sheffield institute, but quickly befriends Irma, Taranee, Cornelia, and Hay Lin, four girls with whom will learns to share her mysterious supernatural abilities. Together they discover that they need to protect Earth from the evil of Metamoor. But things go seriously wrong for the girls at the school's Halloween dance when Metamoor henchmen crash the party and attempt to capture them. The girls have to command their newly discovered powers in their first battle against evil.