Osborne/McGraw-Hill published Perl Annotated Archives, by Martin C. Brown, which features collections of programs that are heavily annotated, to aid in learning. Dave Roth, author of several Perl for Win32 extensions, wrote Win32 Perl Programming: The Standard Extensions for Macmillan. O'Reilly has sent out Learning Perl/Tk by Nancy Walsh. And Addison-Wesley has published Perl Power!, by Michael Schilli.