http://www.oreilly.com/catalog/bash2/
Learning the bash Shell, 2nd Edition
By Cameron Newham, Bill Rosenblatt
2nd Edition January 1998
1-56592-347-2, Order Number: 3472
334 pages, $29.95 US, $42.95 CA, £20.95 UK
http://www.oreilly.com/catalog/linuxnut4/
Linux in a Nutshell, 4th Edition
A Desktop Quick Reference
By Ellen Siever, Stephen Figgins, Aaron Weber
4th Edition June 2003
Series: In a Nutshell
0-596-00482-6, Order Number: 4826
944 pages, $39.95 US, $61.95 CA, £28.50 UK
That should about cover it

or at least keep you busy for a few months