It has been a year or so since the last discussion on textual criticism text books
There are two that seem to be 'major' works on the subject that are not currently in my library
Why should I add them when I already have about twenty others?
The Text of the New Testament
http://www.logos.com/product/24069/the-text-of-the-new-testament
Principles of Textual Criticism
http://www.logos.com/product/6472/principles-of-textual-criticism