You can obtain a copy of this list by anonymous ftp from ftp.wg.omron.co.jp (133.210.4.4), where it's "pub/unix-faq/docs/Unix-C-Booklist". If you can't use anonymous ftp, email the line "help" to "mailserv@iuvax.cs.indiana.edu" for instructions on retrieving things via email.
Send additions or suggestions to mitch@cirrus.com.