Cool one-liner! Might want to switch the last part of the command, though, as all other pdf files in that folder get merged in as well (learned the hard way) :

Cool one-liner! Might want to switch the last part of the command, though, as all other pdf files in that folder get merged in as well (learned the hard way) :-) Something like this would probably be safer: curl -O http://i.stanford.edu/~ullman/focs/ch[01-14].pdf http://i.stanford.edu/~ullman/focs/ch[01-14].pdf && /System/Library/Automator/Combine\ PDF\ Pages.action/Contents/Resources/join.py -o ./merged.pdf ./ch[0-1][0-9].pdf