Not to sound too harsh, but ~ 300 MB seems a bit too much. Maybe you forgot to enable image compression. I did some poking around and discovered that the probl

Not to sound too harsh, but ~ 300 MB seems a bit too much. Maybe you forgot to enable image compression. I did some poking around and discovered that the problem is that all those drawings are incredibly detailed vector art. The "proper solution" is to open each page with Inkscape and convert those vector art drawings into regular bitmap images, probably encoded in JPEG to save space. Alternatively, you can get a reasonable quality DJVU file for under 50 MB with: pdf2djvu --dpi=900 --verbatim-metadata -j4 "NASA Workmanship Standards.pdf" -o "NASA Workmanship Standards.djvu"