Below is what I believe to be a complete bibliography of Derrick Ferguson. I know he posted some fan fiction, as well as blog posts, etc, that aren't included. Much of this is already out of print.
Adventures of Fortune McCall
Black Pulp - Dillon and the Alchemist's Morning Coffee
Peculiar Adventures, Vol 1 - The Secret Whispers of Each Other’s Watch
Pro Se Presents Masked Gun Mystery 2 - The Scarlet Courtesan of Sovereign City
Pro Se Presents Fantasy and Fear 3 - The Day of the Silent Death-a SOVEREIGN CITY tale
The New Adventures of Foster Fade - The Cider King Murder
Baby Daddy in Hollis PI; Will Write for Food
Tales of Fortune: For Violent Fires that Soon Burn Out
Search for the Beast
Dillon Annual 2019
Dillon and the Night Before Christmas
Dillon and the Night of Krampus
Dillon and the Prophecy of Fire
A Town Named Affliction - Bass Reeves Frontier Marshal Volume 1; Will Write for Food
The Bixbee Breakout - Bass Reeves Frontier Marshal Volume 2; Will Write For Food
Derrick Ferguson's Dillon: The Odd Jobs
Dillon and the City of Stone
Dire Learning
Dillon and the Sisters of the Machine
Dillon and the Devil's Mercy
Will Write for Food: The Freelance Stories of Derrick Ferguson
The Madness of Frankenstein
Diamondback: It Seemed Like A Good Idea At The Time
The Vril Agenda
The Undercover Puzzle - Dan Fowler: G-Man Volume Two; Will Write For Food
Dillon Annual Collection 2018
Dillon and the Bad Ass Belt Buckle
Dillon and the Judas Chalice
Dillon and the Pirates of Xonira
Dillon and the Alchemist's Morning Coffee; Black Pulp
Dillon and the Last Rail to Khusra
Mystery Men (& Women) Volume 3 - A Man Called Mongrel pt 2
Mystery Men (& Women) Volume 2 - A Man Called Mongrel pt 1
Young Dillon in the Halls of Shamballah
Sinbad and the Voyage to the Land of the Frozen Sun - Sinbad - The New Voyages; Will Write for Food
The Knobloch Collection Assignment - Tales from the Hanging Monkey Volume 1; Will Write For Food
Fight Card: Brooklyn Beatdown
Dillon and the Legend of the Golden Bell
Dillon and The Voice of Odin
Straight Outta Deadwood - The Relay Station at Wrigley's Pass
Four Bullets for Dillon
Dillon and the Bad-Ass Belt Buckle
Dead Beat in La Esca
Dillon and the Escape from Tosegio
Dillon and the Judas Chalice
Nightscape
The Specialists (The Gantlet Brothers #4)
Diamondback
Derrick Ferguson's Movie Review Notebook
All-American Sports, Volume 2 - Brooklyn Breakdown
The Return of Derrick Ferguson's Movie Review Notebook
How The West Was Weird: Campfire Tales - The Tale of the Baron's Tribute
How the West Was Weird - Of All the Plagues a Lover Bears
Legends of New Pulp Fiction - Voodah of Thunder Mountain
How the West Was Weird: Vol. 3: One Last Bunch of Tales from the Weird, Wild West - Sorrowful are the Souls that Sleep with Gold
PulpWork Christmas Special 2014 - Dillon and the Night of Krampus
Pulpwork Christmas Special 2012 - Dillon and the Night Before Christmas
Black Power: The Superhero Anthology - In Need of a Friend
The Ruckerville Arrangement - Will Write for Food
Fenris the Dreaded One in: And I Say That Unto You is Born…Rayge! - Will Write For Food
Dark Worlds, Spring 2009 - The Tale of the Baron's Tribute
Genesis Science Fiction Magazine #3, Summer 2012 - Another Day on the River
All-Star Pulp Comics Volume Two