(1) 7z is probably not a good idea. I use Simple Comic and cannot read the comic until I have (theoretically) unzipped and rezipped it with a more traditional program.
(2) What kind of files are these? They all unzip into files of 0 bytes. The previews are jpgs, but these?
(3) Furthermore, 72ppi is too low a resolution. Each page appears to be full of compression artifacts.
Traditional methods will yield better results.
Link to the book: *** Link No Longer Exists: Tip Top Comics 008 ***