The Text of the New Testament: Its Transmission, Corruption, and Restoration (4th Edition) by Metzger
http://www.amazon.com/Text-New-Testament-Transmission-Restoration/dp/019516122X/ref=sr_1_1?s=books&ie=UTF8&qid=1447170367&sr=1-1&keywords=metzger+text+of+the+new+testament
Introduction to New Testament Textual Criticism by Greenlee
http://www.amazon.com/Introduction-New-Testament-Textual-Criticism/dp/0801046440/ref=sr_1_1?ie=UTF8&qid=1447170213&sr=8-1&keywords=greenlee%2C+textual+criticism
Fundamentals of New Testament Textual Criticism by Porter and Pitts
http://www.amazon.com/Fundamentals-New-Testament-Textual-Criticism/dp/0802872247/ref=sr_1_1?s=books&ie=UTF8&qid=1447170616&sr=1-1&keywords=porter%2C+pitts%2C+textual+criticism
The Text of the New Testament: An Introduction to the Critical Editions and to the Theory and Practice of Modern Textual Criticism by Kurt and Barbara Aland
http://www.amazon.com/Text-New-Testament-Introduction-Criticism/dp/0802840981/ref=sr_1_2?s=books
