O'Reilly Humble Book Bundle
From the LinkedIn Linux Expert group, there is a posting about a deal for O'Reilly *NIX books. Depending on how much you want to fork out, you can get anywhere from 5 to 16 e-books:
The Humble Book Bundle: Unix presented by O'Reilly
Unix, I nix. We called up our friends at O'Reilly to put together this bundle of Unix resources for all! Find your nutshell reference, your pocket guide, and your power tools here. We've got you covered!
Pay $1 or more for Unix in a Nutshell, 4th Edition; sed & awk, 2nd Edition; lex and yacc, 2nd Edition; Learning the bash Shell, 3rd Edition; and Linux Pocket Guide, 3rd Edition.
Pay $8 or more and you’ll also get bash Cookbook; Classic Shell Scripting; Learning GNU Emacs, 3rd Edition; Unix Power Tools; Learning the vi and Vim Editors, 7th Edition; Bash Pocket Reference, 2nd Edition; and Learning Unix for OS X, 2nd Edition.
Pay $15 or more for all of that plus Essential System Administration, 3rd Edition; TCP/IP Network Administration, 3rd Edition; DNS and BIND, 5th Edition; and Network Troubleshooting Tools.
O'Reilly has a bonus for us, too: Enter your email address to immediately receive an excerpt from "Ten Steps to Linux Survival" by Jim Lehmer. Learn Linux diagnostic and recovery tasks so you can jump in and fix a system problem when your site goes down!
Pay $1 or more. Together, these books would cost over $500. Here at Humble Bundle, though, you name your price of $1 or more!
Read them anywhere. These books are available in PDF, ePUB, and MOBI formats, meaning you can read them anywhere at any time. Instructions and a list of recommended reading programs can be found here.
Support charity. Choose where the money goes – between the publisher, O'Reilly; Code for America; and, if you'd like, a second charity of your choice via the PayPal Giving Fund. For details on how this works, click here. If you like what we do, you can leave us a Humble Tip too!