Ghosts of karnak (a ghost novel), paperback/george mann

Somethings not right with the Ghosts friend Ginny.

something happened to her in Cairo, out on the dig.

Something thats related to a strange cult known as The Circle of Thoth, a baboon with a clockwork eye, dust devils on Fifth Avenue, robed assassins, sacrificial rites, a resurrection machine and a ghostly figure clad in trailing bandages.