The master sleuth on the trail of Edwin Drood

"Archibald Harris's (sic) novel is in the tradition of a Sherlock Holmes pastiche in that it is introduced as a previously unknown manuscript. But there is a novel twist--the manuscript was not written by Holmes chronicler, Dr. Watson, but by Harris's grandfather, who also assumes the rôle of the foil in the adventures of the master detective. Together they search for a literary holy grail, the elusive ending of Dickens's unfinished Edwin Drood"--Jkt.