Two volumes are perfect, at that junction, between "classic" and "modern". I've also split the PDF into 2 smaller PDF files, to make it easier to load on low-end system.
cpdf crpg_book_1-0.pdf 1-259 -o book1.pdf
cpdf crpg_book_1-0.pdf 260-end -o book2.pdf
Edit: Just finished downloading and took a look at it. Splitting it into a "1975-2000" volume, and a "2000-2014" volume seems to make the most sense. That splits it almost exactly in half by page count, as well.