The Creature on the Couch, by Michael Bishop –
Published: 1991
in »The Ultimate Frankenstein«, no. 2
The Bourne Supremacy
The Bourne Supremacy, by Robert Ludlum – Jason Bourne, #2 Published: 1986
Street Music
Street Music, by Joseph A. Konrath – Phineas Troutt Published: 2011
The Man Who Lived at Clapham
The Man Who Lived at Clapham, by Edgar Wallace – The Law of the Four Just Men Published: 1921 in »The Strand Magazine«
Die grüne Schlange
Die grüne Schlange, by Max Schraut – [pseudonym of Walther Kabel] Kabel Kriminalbücher, #6 Published: 1923
Transit to Scorpio
Transit to Scorpio, by Alan Burt Akers – [pseudonym of Kenneth Bulmer] Dray Prescott, #1 Published: 1972
Remo
Remo, by Warren Murphy – Co-authors Richard Sapir and Christopher Wood The Adventure Begins… The Destroyer, prequel Published: 1985
The Creature on the Couch
Jack and Jill
Jack and Jill, by James Patterson – Alex Cross, #3 Published: 1996
The Russian Expeditions
The Russian Expeditions, by John M. House – Co-author Daniel P. Curzon Published: 2019 Center of Military History
The Adventure of the Stockbroker’s Clerk
The Adventure of the Stockbroker’s Clerk, by Sir Arthur Conan Doyle – Memoirs of Sherlock Holmes Published: 1893 in »The Strand Magazine«
Sword of Destiny
Sword of Destiny, by Andrzej Sapkowski – The Witcher, prequel 1 Published: 1993
The Witch Finder General’s Curse
The Witch Finder General’s Curse, by Drac von Stoller – [pseudonym of Kevin Stoller] Horrifying Tales From The Dead I Published: 2011
An Adventure in the Fourth Dimension
An Adventure in the Fourth Dimension, by Farnsworth Wright – Published: 1923 in »Weird Tales«
Das Erbe der Dämonen
Das Erbe der Dämonen, by Wolfgang Hohlbein – Der Hexer, #10 Published: 1990
Last Rituals
Last Rituals, by Yrsa Sigurdardóttir – Thora Gudmundsdóttir, #1 Published: 2005
The Kimberley Secret
The Kimberley Secret, by Gabriel Farago – Jack Rogan, a late prequel Published: 2018
The Stone Leopard
The Stone Leopard, by Colin Forbes – Published: 1975
The Monster and the Maiden
The Monster and the Maiden, by Roger Zelazny – Published: 1971 in »The Doors of His Face«