Enchantress (Sisters of Isis #3)

Meri, Sudi, and Dalila are three girls who live in Washington, D.C., but have little else in common. Or so they think. When an ancient magic is revealed, so are their true identities as Sisters of Isis.

Fifteen-year-old Dalila has never lived a normal life. Homeschooled by her overprotective uncle, she's used to being different from other girls her own age. But not this different. Lately, Dalila has discovered she has magical powers of transformation and the ability to cast spells from the Book of Thoth. When Dalila commits a terrible mistake, however, she finds herself in a desperate race to control this powerful magic. Can a girl who's been so sheltered he whole life protect and entire world from the evil forces of chaos?