The first texts on Perl were published by O'Reilly, which still has the most extensive and up-to-date list on this widely used scripting language.

For anyone who uses Perl frequently, who teaches it, or who has to field questions about it, O'Reilly has published five of its Perl titles on CD. The Perl CD Bookshelf is a package that includes a hardcopy of Perl in a Nutshell and-all on the one CD-browser readable versions of:

The format enables users to search the text for specific information. Of course, the indexes and tables of contents of the individual books are still there; but in addition to those conventional facilities there are options to search the text of all five books as one corpus, and a master index.

A great example of what can be done on CD, and the power of web browser technology. A bonus is that the source code can be viewed by those who are interested in how it is all done. 

A copy is in the library; have a look at it and you are sure to be impressed.