E-mail: lee AT geistlinger.com
This is the O'Reilly llama book. Along with the fatter, more in-depth Camel book (by Wall et al), this the basic Perl book. Intro to the language, regex, operators and so on, with a flip attitude.
For a computer book, it's slim: My (2nd) edition runs under 300 pages (the camel book is over three times that size). However, the info packed in there is clear and concise.
In the course of learning SQL Server and T-SQL, I bought a handful of books, and this one - part of the WROX series - is better than all the others combined.
Vieira clearly knows his subject, and he's not above dinging MS for some stupid implementations. He also tries - with humor and repeated advice - to enforce best practices (Don't put spaces in column names, fer christ's sake!).
The DBA who recommended this book to me had also purchased another thick book dedicated to replication; she took back the latter and used the chapter(s) in this book to learn more. How's that?
A "dummies" book may seem an odd choice, yet I had a DBA recommend this to me, oh, over a half dozen years ago and I'm glad he did. It was a great intro, and still fills a need. I recommend it to everyone who is trying to learn this wacky SQL stuff.