PerlCoreLanguage by StevenHolzner. ISBN: 1-932111-92-1
"Optimized into a compact format, this unique book is the definitive guide to Perl 5 programming."
Covers Perl syntax and programming thoroughly - from the essentials up through the issues of security, creating Perl packages, and topics like dynamic multiple class inheritance. Includes step-by-step solutions on object-oriented programming in Perl. Covers how to handle syntax, math, files, modules, CGI, and OLE for Perl programming. -- Amazon review
See also PerlBlackBook