`Impossible to put down . . ., Another mind-blowing Robert Langdon story' New York TimesA mysterious invitation brings Robert Langdon to Washington DC. There, he is presented with a sequence of bloody clues which he must unravel if he is to prevent a terrible plan. But all is not as it seems in this dangerous city - an ancient organisation will reassert its power once more., The only man standing in its way - Robert Langdon.