Refactoring UI
Adam Wathan & Steve Schoger
Intermediate Perl: Beyond the Basics of Learning Perl
Randal L. Schwartz & Tom Phoenix & Brian D Foy
The Witch of Portobello
Paulo Coelho
Never Use Futura
Douglas Thomas
Introducing Regular Expressions
Michael Fitzgerald
Mastering Regular Expressions, Third Edition
Jeffrey E. F. Friedl
Regular Expression Pocket Reference
Tony Stubblebine