diff --git a/free-programming-books.md b/free-programming-books.md
index cb328c2b86f53e12edecd4eaae80b1b5dac411c7..291d6e335fc4402ae56afb83e43d64378bfd6eab 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -839,24 +839,24 @@ Kerridge (PDF) (Just fill the fields with any values)
 
 ### Bash
 
-* [Advanced Bash-Scripting Guide](http://tldp.org/LDP/abs/html/) - M. Cooper
-* [Bash Guide for Beginners](http://www.tldp.org/LDP/Bash-Beginners-Guide/html/) - M. Garrels
-* [Bash Notes for Professionals](http://books.goalkicker.com/BashBook/) - Compiled from StackOverflow documentation (3.x)
-* [BASH Programming](http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html)
-* [Bash Reference Manual](http://www.gnu.org/software/bash/manual/bashref.html)
-* [Bash tutorial](http://gdrcorelec.ups-tlse.fr/files/bash.pdf) (PDF)
-* [BashGuide](http://mywiki.wooledge.org/BashGuide)
-* [Conquering the Command Line](http://conqueringthecommandline.com/book/frontmatter) - Mark Bates
-* [Getting Started with BASH](http://www.hypexr.org/bash_tutorial.php)
-* [Google Shell Style Guide](https://google.github.io/styleguide/shell.xml)
-* [Introduction to the Command Line](https://launchschool.com/books/command_line) - Launch School
+* [Advanced Bash-Scripting Guide](http://tldp.org/LDP/abs/html/) - M. Cooper (HTML)
+* [Bash Guide for Beginners (2008)](http://www.tldp.org/LDP/Bash-Beginners-Guide/html/) - M. Garrels (HTML)
+* [Bash Notes for Professionals](http://books.goalkicker.com/BashBook/) - Compiled from StackOverflow documentation (3.x) (PDF)
+* [BASH Programming (2000)](http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html) - Mike G. (HTML)
+* [Bash Reference Manual](http://www.gnu.org/software/bash/manual/bashref.html) (HTML)
+* [Bash tutorial](http://gdrcorelec.ups-tlse.fr/files/bash.pdf) - Anthony Scemama (PDF)
+* [BashGuide](http://mywiki.wooledge.org/BashGuide) - Maarten Billemont (HTML) [(PDF)](http://s.ntnu.no/bashguide.pdf)
+* [Conquering the Command Line](http://conqueringthecommandline.com/book/frontmatter) - Mark Bates (HTML)
+* [Getting Started with BASH](http://www.hypexr.org/bash_tutorial.php) (HTML)
+* [Google Shell Style Guide](https://google.github.io/styleguide/shell.xml) - Paul Armstrong (HTML)
+* [Introduction to the Command Line](https://launchschool.com/books/command_line) - Launch School (HTML)
 * [Linux Fundamentals](http://linux-training.be/linuxfun.pdf) - Paul Cobbaut (PDF)
-* [Linux Shell Scripting Tutorial - A Beginner's Handbook](http://www.freeos.com/guides/lsst/)
-* [Linux Shell Scripting Tutorial (LSST) v2.0](https://bash.cyberciti.biz/guide/Main_Page)
-* [Slackbook](http://slackbook.org)
-* [The Bash Academy](http://www.bash.academy)
+* [Linux Shell Scripting Tutorial - A Beginner's Handbook (2002)](http://www.freeos.com/guides/lsst/) - Vivek G. Gite (HTML)
+* [Linux Shell Scripting Tutorial (LSST) v2.0](https://bash.cyberciti.biz/guide/Main_Page) - Vivek Gite (HTML)
+* [Slackbook (2005)](http://slackbook.org) - Alan Hicks, Chris Lumens, David Cantrell and Logan Johnson (HTML, DocBook, Postscript, PDF) 
+* [The Bash Academy](http://guide.bash.academy) - Maarten Billemont (HTML)
 * [The Linux Command Line](http://linuxcommand.org/tlcl.php) - William E. Shotts, Jr. (PDF)
-* [Writing Shell Scripts](http://linuxcommand.org/lc3_writing_shell_scripts.php) - William E. Shotts, Jr.
+* [Writing Shell Scripts](http://linuxcommand.org/lc3_writing_shell_scripts.php) - William E. Shotts, Jr. (HTML)
 
 
 ### Basic