Sherlock Holmes is such a great novel series don't you think?
Its really good, timeless classic
stories in "The Strand Magazine", beginning with "A Scandal in Bohemia" in 1891; additional tales appeared from then until 1927, eventually totalling four novels and 56 short stories. All but one are set in the Victorian or Edwardian eras, between about 1880 and 1914. Most are narrated by the character of Holmes's friend and biographer Dr. Watson, who usually accompanies Holmes during his investigations and often shares quarters with him at the address of 221B Baker Street, London, where many of the stories begin.
rich family history by speculating familial connections between them (such as a blood-relationship between Sherlock Holmes and Tarzan). Roger Zelazny's novel "A Night in the Lonesome October" combines Sherlock Holmes, Doctor Frankenstein, Jack the Ripper, and the Cthulhu Mythos, although he never specifically identifies them as such ("The Count", "The Good Doctor", "Jack", etc.).
Occasionally, authors will include into crossovers classic fictional characters whose copyright is still held by the original authors (