Caminante:
The crappy quality is because the PDFs uploaded to JW.org have all images reduced to 150 ppi.
That sounds pretty ridiculous for a large publishing company that has always claimed to be on the forefront of publishing technology. They managed to come up with unnecessarily large files and still have crappy quality. Genius. It's quite odd that they haven't since replaced the large files with smaller files of better quality, at least in the more common languages.
And the Greatest Man book probably needs some 'New Light'™ updates anyway...