Legend of the Pharaoh's Tomb (Chronicles of the Moon #1)

Olly (Olivia) and Josh are on an archaeological dig in Egypt, searching for the first Talisman of the Moon -- the Tears of Isis. The friends are determined to investigate, but there are lethal booby-traps in the pharaoh’s tomb, an ancient riddle to be solved and someone is trying to sabotage the dig.

Also called The Tears Of Isis (Talisman #1)