'Some doors should never be opened.
'When Rose Black's sister goes missing, she once again calls upon Jake Crowley for help, but the two get more than they bargained for. The search takes them on a twisting journey, where danger lies at every turn. From ancient pyramids to lost cities, deadly cultists and conspirators lie in wait as Jake and Rose navigate depths few have dared on a pulse-pounding search for the ANUBIS KEY!'
Source: Publisher's blurb.