I approached this book as a competant programmer with web experience but no knowledge of CGI or Perl. I was looking for a book that would give real world examples of the most common uses of Perl in websites - e-mail scripts, search scripts and reading and writing data files. If this sounds like you, buy it! The book is excellent and quickly give me the confidence to approach projects that required Perl.
Though be warned, if you are not a programmer, don't expect miracles. Also, if you are a programmer who wants to thoroughly understand what you are learning, this is not for you - go for a more complex reference book.
This is ideal for the contract programmer with little time and tight deadlines to advance beyond flat HTML sites with the minimum of effort and without messing up projects.