You can tell Apache to automatically generate an index of the ebooks. So that when you open the site http://intersci.ss.uci.edu/wiki/eBooks/ in their web browser, it generates a listing for them. I have temporarily enabled this feature right now for you to try out. Please let me know if you like it. Also, do you want Google to be able to search/index this directory? If not, you need to read about a file called robots.txt and place one that blocks Google or Yahoo search engines in this directory.