I used to think authors thanking their families
was clich?©. Now I understand. I couldn??™t have finished this book without your support.
Shane Warden
Thanks to Jim for arguing with me while writing the first version of this book (it??™s better for it) and for
convincing me that the second edition was worth doing.
Thanks to Allison and Andrew for the tools we used to write this book.
Thanks to my family for supporting me (and not grumbling too much while I sat upstairs and wrote
very slowly), and to my friends for dragging me out of my house once in a while.
Thanks also to the other contributors to Parrot and Perl 6 for being unwitting collaborators, examples,
and victims of some of the ideas in this book. The work we do continually amazes me.
XVIII P R E F A C E
PART I
Getting Started
CHAPTER 1
Why Agile?
Agile development is popular. All the cool kids are doing it: Google, Yahoo, Symantec, Microsoft, and
the list goes on.* I know of one company that has already changed its name to Agili-something in order
to ride the bandwagon. (They called me in to pitch their ???agile process,??? which, upon further inspection,
was nothing more than outsourced offshore development, done in a different country than usual.
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