The books will be outlined and plotted by series creator Robert Kirkman, with horror novelist Jay Bonansinga (Perfect Victim) writing the novels themselves, reports CBR.
"It's all comic book continuity," said Kirkman. "It'll basically be about characters that aren't in the series anymore, so it won't really affect continuity in the comic book series; it'll be little snippets of the past, really interesting nuggets."
He said that the first novel will focus on "one very popular character who is no longer in the series anymore, and it shows how he came to the place that he ends up in the comic book series".
"It's a very cool thing to be able to go back and expand everything," he said. "The way it's going to work is that it'll be a standalone novel that you can just get and read. It'll just be a cool book about this person.
"You don't have to read the comic book series to enjoy it, but if you've read both, there will be things where you're like, 'Oh, so that's how that happened.'"