sed & awk: UNIX Power Tools (Nutshell Handbooks)

Mastering Regular Expressions: Understand Your Data and Be More Productive

grep Pocket Reference: A Quick Pocket Reference for a Utility Every Unix User Needs (Pocket Reference (O'Reilly))

Classic Shell Scripting: Hidden Commands that Unlock the Power of Unix

Learning the bash Shell: Unix Shell Programming (In a Nutshell (O'Reilly))

Linux Command Line and Shell Scripting Bible

Learning the vi and Vim Editors: Text Processing at Maximum Speed and Power

sed and awk Pocket Reference: Text Processing with Regular Expressions (Pocket Reference (O'Reilly))

bash Cookbook: Solutions and Examples for bash Users (Cookbooks (O'Reilly))

Bash Pocket Reference: Help for Power Users and Sys Admins