Sequel to The List of 7. It's been ten years since Doyle first met the brilliant Jack Sparks and together they cracked the deadly case of The List of 7. Inspired by his friend, Doyle went on to create Sherlock Holmes, the character that has since made him a wealthy and celebrated man. Now off to America for his first book tour, Doyle is joined by his impetuous younger brother, Innes and a cryptic Irish priest.

In their voyage across the Atlantic to the slums of lower Manhattan and the dark alleys of Chicago to a final apocalyptic confrontation in the searing Arizona desert, Doyle and his companions track the paths of six mysterious strangers who are united by a single, eerie dream...