Book — James Rollins

Lady Kara Kensington's family paid a high price in money and blood to found the gallery that now lies in ruins. And her search for answers is about to lead her into a world she never imagined existed: a lost city, buried beneath the Arabian desert, where something astonishing is waiting...
A covert government operative hunting down a traitor is being drawn there. But at the end of a perilous journey lies an ageless power that can create a utopia - or tear down everything humankind has built over millennia of civilisation...