The Evangelical Textual Criticism blog just posted news of a new book on this well-known and textually controversial passage (the woman taken in adultery):
David Alan Black and Jacob Cerone (eds.), The Pericope of the Adulteress in Contemporary Research.
The publisher’s description notes that the book seeks to “re-examine the Pericope Adulterae (John 7.53-8.11) asking afresh the question of the paragraph’s authenticity. Each contributor not only presents the reader with arguments for or against the pericope’s authenticity but also with viable theories on how and why the earliest extant manuscripts omit the passage.”
Those interested in New Testament textual criticism will find it useful. It’s expensive, but JSNTS volumes often appear in paperback later for much less.