This title simply does what its title suggests; it introduces novices into regular expressions. The book is short, but informative, and it tries to be as language independent as possible.
- Michael Fitzgerald: Introducing Regular Expressions, Unraveling regular expressions, step-by-step
- O'Reilly, 2012
- 154 pages
- product page on the publisher's site
Expect short, pragmatic chapters on very basic topics. The explanations are pretty clear and easy to follow. The accompanying github repo contains all the files you need to follow the examples - and you should download those files and try out the online tools and unix utilities. This title is using a typical learning by doing approach, you won't get much theory on the background.
Each chapter ends with a technical notes section in which you can find information about the tools used in the chapter. The Appendix and the Regular Expression Glossary are pretty good for further references.
I'm sure a novice becomes a well-grounded beginner after working through this book.