You can download PostScript and PDF versions of the Lions book here:
http://morris.xsdeny.net/data/docs/unix/lionc.ps
http://morris.xsdeny.net/data/docs/unix/lionc.pdf
You can also view Google's rendition here:
http://216.239.51.104/search?q=cache:www.upl.cs.wisc.edu/~epaulson/lionc
.ps
In my opinion, the LaTeX version would still be interesting. The
previously mentioned files themselves were probably produced from that
source.