I couldn't find a single pdf version of the book, and I failed to find the copyright to know whether I'm allowed to upload such a version myself. In any case,

I couldn't find a single pdf version of the book, and I failed to find the copyright to know whether I'm allowed to upload such a version myself. In any case, the following two lines are what I used to unite the files using bash and the pdfunite utility (available as the poppler-utils package in ubuntu) for my own personal use. for i in {1..12}; do wget `printf "http://pcgbook.com/wp-content/uploads/chapter%02d.pdf" $i`; done pdfunite chapter*.pdf ProceduralContentGenerationInGames.pdf