The Blue Djinn of Babylon (Children of the Lamp, #2)

From acclaimed thriller writer Philip Kerr, comes the second volume in this exceptional, imaginative adventure trilogy about a twin boy and girl who discover they are djinn descendants.
John and Philippa Gaunt, twelve-year-old twins who have recently discovered themselves to be descended from a long line of djinn and in possession of magical powers, continue on their extraordinary adventures in this sequel to THE AKHENATEN ADVENTURE. When a powerful book of djinn magic goes missing, John and Philippa are called upon to retrieve it. Only, the book isn't really missing. The trap was set and Philippa is abducted by the Blue Djinn. In this latest installment of the twins' magical adventures, John and his uncle Nimrod must find Philippa before it's too late.