See /g/2201585/3b6604ab10/ for the rest of Buck Godot's adventures. Pseudo-Nim's pages were downloaded from Phil Foglio's web site. The "Classified" chapter has nudity, so was not on the web site. These scans are from very old trade paperbacks (TPB) so are not great quality. But now you can see the missing chapter. In addition, each TPB has introductory text.
On the off-note - one of the pages in my gallery is in rather miniscule variant - it is a double-page spread, and Foglios never came to actually posting the second part of it - one with no text - in normal resolution.
One thing, though - tag "story arc" demands either ~75 pages or 4 chapters of the story in the single gallery. Which is not the case here, I presume.