He is a noted literary editor and annotator of classic genre fiction, including the Sherlock Holmes stories and the novels Dracula, Frankenstein, and Strange Case of Dr. Jekyll and Mr. Hyde as well as Neil Gaiman's The Sandman comics, Alan Moore's and Dave Gibbons's graphic novel Watchmen, the stories of H.P.

[1] It was in law school that he developed his interest in Holmes, leading him to amass a collection of thousands of books about the detective.

[6] In 2011, he co-edited with Laurie R. King The Grand Game, a two-volume collection of classical Sherlockian scholarship published by the Baker Street Irregulars,[7] and A Study in Sherlock, a collection of stories by all-star writers inspired by the Sherlock Holmes tales (Random House).

A second volume co-edited with Morton, Weird Women: Classic Supernatural Fiction by Groundbreaking Female Writers, 1852-1923, was published in 2020.

In 2018, Pegasus Books published Classic American Crime Fiction of the 1920s, which includes House Without a Key (the first Charlie Chan novel by Earl Derr Biggers), Red Harvest (the first novel-length Continental Op mystery by Dashiell Hammett), The Roman Hat Mystery (the first Ellery Queen novel), The Benson Murder Case (the first Philo Vance novel by S.S. Van Dine), and Little Caesar by W.R. Burnett, the basis for the first great gangster film.

The anthology tells the stories of exonerees—individuals wrongfully incarcerated for crimes they did not commit—as told to major mystery and thriller writers.

The volume is introduced by Scott Turow and Barry Scheck and also contains a previously unpublished essay by the renowned playwright Arthur Miller on a wrongful conviction case.

His next major book, New Annotated Strange Case of Dr. Jekyll & Mr. Hyde by Robert Louis Stevenson, with an introduction by Joe Hill, was published in October 2022 by the Mysterious Press.

The series consisted of Phantom of the Opera by Gaston Leroux, followed by The Beetle by Richard Marsh, Vathek by William Beckford, House on the Borderlands by William Hope Hodgson, Of One Blood by Pauline Hopkins, The Parasite and Other Tales of Terror by Arthur Conan Doyle, The King in Yellow by Robert W. Chambers, Ghost Stories of an Antiquarian by M.R.

James, Gothic Classics: The Castle of Otranto and The Old English Baron by Horace Walpole and Clara Reeve, and The Mummy!

Grafton, Case Pending by Dell Shannon, Final Proof by Rodrigues Ottolengui, Last Seen Wearing by Hillary Waugh, The Silent Bullet by Arthur B. Reeve, The Dead Letter by Seeley Regester, Jim Hanvey, Detective by Octavus Roy Cohen, The Metropolitan Opera Murders by Helen Traubel, The Conjure-Man Dies by Rudolph Fisher, Average Jones by Samuel Hopkins Adams, Room to Swing by Ed Lacy, The Master of Mysteries by Gelett Burgess, A Gentle Murderer by Dorothy Salisbury Davis, The Thinking Machine by Jacques Futrelle, The "Canary" Murder Case by S. S. Van Dine, In the Fog by Richard Harding Davis, and V as in Victim by Lawrence Treat.

Coming in 2025 are To Catch a Thief by David Dodge (novelist), and Uncle Abner by Melville Davisson Post.

Klinger is a member of the Sherlock Holmes literary club called The Baker Street Irregulars,[12] as well as numerous other Sherlockian societies such as The Illustrious Clients of Indianapolis.

He is an honorary member of the Mystery Writers of Turkey[21] and currently serves on the editorial board of the Journal of Dracula Studies.