Initially known as a publisher of licensed properties, Millennium adapted works by Arthur Conan Doyle, Lester Dent, Robert E. Howard, Harlan Ellison, H.P.

Millennium gave early exposure to comics artists such as Darryl Banks,[1] Brian Michael Bendis, Dean Haspiel, Adam Hughes, Michel Lacombe, David W. Mack, Josh Neufeld, Rik Levins, and Mike Wieringo; and utilized industry veterans like John Bolton, Mark Buckingham, Don Heck, Kelley Jones, Jim Mooney, Rudy Nebres, Steve Stiles, and Roy Thomas.

In many ways representative of the boom period of independent comic book publishing, Millennium thrived in the early years of the 1990s and fell on lean times as the decade came to a close.

[citation needed] Also in 1991, Ellis conceived and scripted the critically acclaimed Nosferatu: Plague of Terror, a four-part series that provided a complete story of the title character's origin quite apart from the Dracula legend, featuring art by Rik Levins and Richard Pace.

[5] The company's three-issue Asylum horror anthology (published under its Borderland emblem)[6] included reprints of Archie Comics' 1970s Red Circle Sorcery series, and featured the talents of Vicente Alcazar, John Bolton, T. Casey Brennan, Mark Buckingham, Howard Chaykin, Duncan Eagleson, Neil Gaiman, Pia Guerra, Don Hillsman II, Matt Howarth, Carlos Pino, and Al McWilliams, among others.

During this period, Millennium also published its first nonfiction title, Don Hillsman II and Ryan Monihan's By Any Means Necessary: The Life and Times of Malcolm X, an unauthorized biography in comic book form.

At the end of 1993, co-owners Ellis and Martin, who also functioned as the editorial and production staff, sold their shares in Millennium to Davis, but retained ownership of a number of comics properties, such as Nosferatu, The Miskatonic Project, and the new Justice Machine.

In July 2008, Millennial Concepts joined forces with Caliber Comics founder Gary Reed's Transfuzion Publications in a joint graphic novel-publishing venture.