The story isn't essential, but then again, it's not volume four of the main series.
Ghostwriter by Rayco Pulido.
Ghostwriter: From Fantagraphics, the 90-ish page hardcover is billed as a darkly comic noir mystery Spanish author Rayco Pulido wrote and drew the work While I admire the capable cartooning, I just didn't find the comic tremendously funny[...]
