Introducing Regular Expressions

Done with Introducing Regular Expressions, by Michael Fitzgerald.
The subtitle, of the book says it all.

Unraveling Regular Expressions, Step-by-Step

Michael is a funny, patient and pithy author.

The book breaks down the basics of Regular Expressions into its components and then walks through explaining them in examples, line by painstaking line.
Any book that uses Coleridge to teach me Regular Expressions is awesome, so I’m biased :)

Definitely worth a read if you are brand new to the powerful world of RegEx.