Advanced Bash-Scripting Guide

I was looking for a good Bash tutorial (I keep forgetting the spelling of the n-th undocumented feature of what some consider the woderful Bash). Here it is: "Advanced Bash-Scripting Guide,
An in-depth exploration of the art of shell scripting", by Mendel Cooper [ http://tldp.org/LDP/abs/html/ ]. I have found the Arrays [ http://tldp.org/LDP/abs/html/arrays.html ] and the Loops [ http://tldp.org/LDP/abs/html/loops1.html ] sections particularly helpful.