Robert Holtzman wrote:
> oAny recommendations for one that goes into a little depth with exercises 
> and, hopefully, answers?
> 

These aren't dead-tree material, but they are absolutely wonderful 
sources of information for bash scripting:

Advanced Bash Scripting Guide
http://tldp.org/LDP/abs/html/

Bash Hackers
http://bash-hackers.org/wiki/doku.php?id=

Bash FAQ
http://wooledge.org:8000/BashFAQ

All three have a number of Bash specific constructs but 99% of it is 
portable to all Bourne based shells.  The ABSG is more of a traditional 
book to read in chapters.  Bash Hackers and Bash FAQ have an incredible 
amount of useful examples on doing practical things.  I recently wrote 
an xml parser and web server in Bash and absolutely could *not* have 
done it without those three resources!

Kurt