The Man from Miami was the title of an unpublished novel by David Gemmell. His very first attempt at writing, it was a crime thriller centred around an assassin. Gemmell wrote the novel while working as a lorry-driver's mate for Pepsi Cola.
The response from the publishers informed him that he had "absolutely no aptitude for creative thought" and "wouldn't get published if he lived seven lifetimes" (the seven lifetimes was apparently a reference to the main character of the book). Gemmell himself later remarked that the novel was "so bad it could curdle milk at fifty paces".