What to read after Children of the Lamp?

John and Philippa Gaunt, two twelve-year-old not-very-identical twins, live a privileged life on the Upper East of Manhattan with their wealthy parents and two curiously-mannered Rottweilers named Alan and Neil. The twins realize there's something amiss with their world when a string of strange things begin to happen after their wisdom teeth are extracted--they dream the same dreams, become stronger, their zits clear up, and wishes wished in their presence inexplicably come true. And, when their estranged Uncle Nimrod asks them to come to England for the summer during one such shared dream, the discovery of their destiny is set in motion. John and Phillippa discover that they are descended from a long line of Djinn, have great inherent powers. They must call on these powers a lot sooner than they anticipated, though, because the ancient Egyptian pharaoh Akhenaten is not as dead as history has so far declared and his legion of seventy magical djinn could tip the balance of power in the magical realm and affect the whole world order.