I used ps2pdf[1] to make a cleaner/better version from the original PostScript[2] file from Paul Graham's site[3]:

http://slackwise.net/files/docs/The%20Roots%20of%20Lisp.pdf

The tracking/kerning is still off, but not as much. It's definitely easier to read than the one linked in this post. Anyone know a better utility, or is the source PostScript just poorly typeset?

Edit: I've just applied pkfix[4] to the file as mainland recommended[5], and it looks wonderful! I've replaced the file on my server, so you can Ctrl-F5 it to see the wonderful crisp text.

[1]: http://ghostscript.com/doc/current/Ps2pdf.htm [2]: http://lib.store.yahoo.net/lib/paulgraham/jmc.ps [3]: http://www.paulgraham.com/rootsoflisp.html [4]: http://ctan.mackichan.com/support/pkfix/pkfix.pl [5]: https://news.ycombinator.com/item?id=8350995