Completed 8.1-zlib
Completed 8.2-gzip
Completed 8.3-bz2
Complete 8.4-tarfile.  Noticed a problem with the error messages for modes 'a:gz' and 'a:bz2', run the file to see, it's in the last two lines of output.
Complete 8.5-zipfile and that's All of Chapter 8.  I was going to skip ahead to Chapter 10, but I think I'll redo Chapter 9 to refresh my memory.