The title is misleading in that it doesn't give the full impact of what's going on with this book. This book was written by somnething of a who's-who of the Perl community and it's similiarly a massive aggregation the best applications of nearly all of Perl's features. It's true that it's edited versions of TPJ articles but TPJ has always been hands-on and the feel is more as though the best pages were ripped out of already great Perl books to be arranged and edited into one volume. I urge you to think of this as a book in the vein of Programming Perl but written by everyone but Larry Wall. =)
Because nearly every article was written as the result of a Perl feature manifesting itself to violently break through a hard problem, this book contains a collection of examples that no single human could possible contrieve. Other books (even Programming Perl by comparison) relatively thoroughly demonstrate and document the language features but only this one shows each feature shining as it solves real problems in real problems taken from real life. You'll get a feel not only for the syntax of features but how to think about them. You'll start to spot new and better applications for Perl's features in your own programming work.
Compared to other books, it's more verbose than Programming Perl and it neglects the bare basics and moves much further with the ideas. It examines more macro scale ideas than the Perl Cookbook and generalizes thier applications rather than giving numerous specifics. The closest example I can think of is the styles and much of the contents of Advanced Perl Programming, Learning Regular Expressions, Learning Algorithms with Perl and several others rolled into one.
It goes into more depth on why things are the way they are than any other Perl book. For example, one chapter demonstrates how things would go wrong if the order of operators were different than how they are and using the good and bad arrangements walks the reader through infering what the relative orders are. Where other books list the order of operations in a matter-of-fact way, this one leaves you with a sense of order and rationality of things that your intuition and creativity can feed off of when programming.
Quoting from the foreword (Hi Mark Jason Dominus!): "It does not suffer from the usual flaw of the anthology, which is that the best you can hope for is that more than half of the articles are above average. On the contrary, it is by turns brilliant, witty, and profound.". And from the preface: "In a sense, this book was written very carefully and methodically over six years. ... Every issue, there were a lot of new subscribers, many of whom were new to Perl. Common sense dictated that I should include beginner articles in every issue, but I didn't like where that line of reasoning led. If I catered to the novices in every issue, far too many articles would be about beginner topics. ... So I did something very unusual for a magazine: I made it easy (and cheap) for subscribers to get all of the back issues when they subscribed, so they'd be able to enjoy the introductory material. A side effect of this approach was that the articles hang together very well: they tell a consistent "story" in a steady progress from TPJ #1 to TPJ #20...".
Perl's books have always been one of it's major strengths and I'm happy this trend continues. Computer Science & Perl Programming is delightful.