My top choices:
- AI Exploration in Perl
- Perl is too slow for AI programming in general, but it's a great way to explore basic concepts and perhaps whet people's appetites.
- Perl for Students
- Build simple dynamic Web pages. Download music. Post to your blog. Tell the RIAA to go stuff themselves.
And while I don't know that it would make an entire book, more information about using chromatic's P5NCI would be great. It would make it much easier to use a lot of existing C or C++ code for the traditionally slow bits of Perl.