rahmu wrote"Python for Unix and Linux system administration." by Noah Gift and Jeremy M. Jones, O'Reilly - Awesome book if you are interested in scripting but look for something a little more than bash or ksh.
"Advanced Linux programming." by Mark Mitchell, Jeffrey Oldham and Alex Samuel, New Riders - C and Unix are tightly linked, that book shows me why.
Python for Unix and Linux system administration. That's a very nice book, read it.
Currently i'm finishing C++ with "Absolute C++" - Walter Savitch.
Got 4 more books to finish, i hope i have time to read them all in the upcoming months:
Hacking - The Art of Exploitation by John Erickson
Apress Expert Shell Scripting by Ron Peters
Detecting Malice by Robert Hansen
Syngress - Open Source Fuzzing Tools by lots of authors cba to name them lol.