While Perl is an important language for web programmers, I feel that it should be learned in whole and not in a small reference. The "Visual Blueprint" series has its purpose, however "Perl: Your visual blueprint for building Perl scripts" does not explain many important advanced tasks that Perl programmers often get into.
I enjoy the aesthetic quality of the Maran Graphics' books, and have nothing against this book. However, serious programmers who want to learn much more of Perl and CGI should take a look at Perl How to Program by the Deitels. It is much more effective in teaching Perl theory as well as giving you a lot examples that are complex enough to use multiple ideas. The Complete Perl Training Coarse (also from the Deitels) is very effective as well.
I am still a child, but I have explored many server-side programming technologies (Java Servlets, Applets, JSP, CGI, and Perl) and feel that I am expierenced enough to review this book.