I have half of the books on this page and I wouldn't get rid of any of them
http://www.willbell.com/ccd/index.htm
If you are into a bit of math and the nuts and bolt of how it all works then this is the book for you.
http://www.willbell.com/aip/index.htm
And this is the Ireland book I was talking about
http://www.willbell.com/ccd/photoshop_astronomy.htm