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To get the most out of this book, you'll want to be familiar with Object Oriented programming in Perl, because (with the exception of LWP::Simple) all the modules discussed in this book use objects.
Also, don't expect the LWP sample code in the book to work correctly. Many of the sites that the scripts try to "scrape" have changed their layout since this book was published, braking the scripts. This isn't a problem though, because the samples Sean provides are very short and clear, so it's not necessary to run them in order to figure out how they work.
If the above hasn't totally disqualified me from commenting, I just wanted to note some things most reviewers have ignored.
The book is an excellent resource for two kinds of people.
Many people scan technical books looking for little scripts and thingies; a few lines changed and BOOM! They have the program they always wanted. Sean provides those in abundance.
It is also a good resource for a complete novice to learn about the hodgepodge of technologies we call the web - the ... wire protocol, markup languages, tree-based parsers, and encodings, to name just a few. The author is an expert in all of these, but has restrained himself to provide just enough information to get a programmer going. I was impressed time and again with how he manages to give the reader exactly enough knowledge to get their tasks done, with short but accurate explanations and pointers on where to learn more.
Best of all, this is a funny technical book. Usually if a technical book has pretensions to humor, it jabs you in the arm repeatedly with lots of groaner puns and dumb cartoons, in order to fill the space between bland code sections. But Sean has sprinkled the *code sections* with his dada sense of humor, which also highlights the difference between mere placeholder data and the concept being illustrated. And then the text gets right back to the point.
This is a slim work (242 pages, no thicker than my thumb) but packs a lot of value for your money. So buy it already.
My only criticism is that it is exclusively focused on consuming services on the web - like downloading TV listings and so on. But you can use everything Sean talks about to also *publish* information; for instance, making some nifty Perl-based thing to update your online journal from MS Word or something. Or to aggregate information that's out there, and feed it back onto the web. Nevertheless, if you've got half a brain it will be obvious how to do this stuff once you've absorbed everything you'll get from this book.
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The premise of the novel is simple. A young prostitute is murdered and the next morning Jack Farissey, an alcoholic self-medicating pharmacist, wakes up covered in blood and unable to remember a thing about the previous night. In a conventional thriller Farissey would be one step ahead of the police, desperate to prove his innocence before the handcuffs were slapped on but this is a novel that rarely chooses the obvious path. The police, led by detective Hargest, have little or no interest in the truth. They are pursuing a different kind of justice and begin a relentless campaign to frame local gangsters, the Baja brothers, for the murder. Things are complicated when Jack's wife Victoria returns and joins the Baja's defence team. Although the plot twists and turns like a Russian gymnast on speed, the reader though frequently breathless is never left behind. There is a lyrical despair to the writing and a depth of characterisation one doesn't find often in thrillers but this is more than just a thriller, it is a deep and penetrating look into the soul of the marginal, disenfranchised and desperate inhabitants of Butetown, an area of Cardiff which makes the mean streets of New York look like EuroDisney. Imagine "Heart of Darkness" written by Raymond Chandler and set in Cardiff and it becomes possible to glean some idea of a book that is doomed, haunting and unforgettable; a book that makes the darkness seem bright in comparison. "Deadwater" is a novel that is both literary and gripping and, in Sean Burke, readers of James Lee Burke, Ian Rankin and James Elroy have found another name to put on their shelves.