Wikipedia
"Grimhaven" is the manuscript for a unpublished book by hard-boiled crime writer Charles Willeford. Originally intended as Willeford's sequel to Miami Blues, the novel was deemed too dark for publication, and his agent refused to send it on to the publisher. The novel New Hope for the Dead was later written and published as the second book in the Hoke Moseley series.
A photocopy of the hand-typed manuscript is maintained in the Charles Willeford Archive at the Bienes Museum of the Modern Book in Fort Lauderdale, Florida. The holdings inventory notes: "as per Betsy Willeford [widow of the author]: 'Ms. of the "black Hoke Mosely" , never published, sold to a small but ruthless group of collectors in the form of Xerox copies. May not be copied in the library by patrons who'll wholesale it on the Internet.'"