Both. The selection includes comics/graphic novels (collected comic volumes) and prose novels from the Walking Dead novel series.
Bonus content varies by edition. Examples in this selection include extra covers and a sketchbook noted for at least one oversized hardcover; available extras depend on the specific edition.
The listings include both paperback and hardcover formats. Several entries are labeled "Format: Paperback," while at least one lists "Format: Hardcover."
Sizes vary by edition. Example dimensions from this selection include 10.2 x 6.6 x 2.0 inches and 11.1 x 7.5 x 0.9 inches; many paperbacks are around 10.2 x 6.6 x 0.4–0.6 inches.
Author credits in these listings include Robert Kirkman and Jay Bonansinga, with some entries credited to one or both authors.
Several listings note the comics served as the basis for the television series, and some novels are described as companions or extensions of that same universe.
