25 Things You Didn’t Know About Se7en
3. Instead, There Was A Comic Book. A Comic Book.
In 2006, Zenescope Entertainment acquired a license to produce a seven-part limited series based on John Doe’s fascination with the seven deadly sins.
Starting with Gluttony, each issue featured a new sin in the order of their introduction in the movie - so Greed, Sloth, Lust, Pride, Envy and finally Wrath in October 2007. The series was an anthology format, meaning that each issue (and therefore each sin) was written and drawn by a different creative team, the only constant being the editorial team of David Seidman Ralph Tedesco.
Pages of the journal glimpsed in the film were included in the art, but the format precluded against there being any real story, so it's not really a prequel as such - and therefore it's really only for completists and obsessives. Which is handy, because it's out of print and the hardcover collection is going for about a hundred bucks on Amazon.