Children of the Lamp: The Akhenaten Adventure by P.B. Kerr.

Children of the Lamp: The Akhenaten Adventure by P.B. Kerr begins the adventures of Phillipa and John Gaunt, twin brother and sister who find out shortly after they turn twelve, that they are Djinn which is both singular and plural (We mundanes often refer to them as Genies, but they hate the word.)

Upon this discovery, they are suddenly on an unexpected adventure with their Uncle Nimrod, their mother's brother who is also a Djinn. (Their mother is also a Djinn, though their father is not.) They discover that they are from a tribe of good djinn, but there are tribes of bad djinn out there, who are looking for 70 djinn who have been lost for thousands of years, likely locked in something that the ancient pharoah, Akhenaten owned. If the bad Djinn get hold of these trapped Djinn, they will turn them toward evil purposes. But if good djinn can find them first, they can turn them to good purposes. So off they go! This is a fun tale for both youngsters to read, and adults who enjoy middle grade adventures!