I did pages 76 through 82 and then tried saving it for the first time and it "Encountered a problem and needed to close." Apparantly, it was sorry for the inconvenience. I started over and got to page 86.
I think a lot of stuff from this Chapter was kind of cool. Especially the part where you take to supposedly unrelated maps (ie. South Dakota and USA) and they overlap at the right spot in the latitude/longitude system.