Selected Gospel of Thomas Books in English, 1983-2012

Translation/Commentaries (including Coptic and Greek)

April DeConick, The Original Gospel of Thomas in Translation (T&T Clark, 2007)

Uwe-Karsten Plisch, The Gospel of Thomas: Original Text with Commentary
... (tr. Gesine Schenke Robinson, Deutsche Bibelgesellschaft, 2008)

Simon Gathercole, The Gospel of Thomas: Introduction and Commentary (Brill, 2014)
... (a more reasonably-priced paperback now available)

History/Commentary, 2000-2012

Stevan Davies, The Gospel of Thomas Annotated & Explained (Skylight Paths, 2002)

April DeConick, Recovering the Original Gospel of Thomas (T&T Clark, 2005)

Christopher W. Skinner, What Are They Saying About the Gospel of Thomas? (Paulist Press, 2012)

Mark Goodacre, Thomas and the Gospels: The Case for Thomas's Familiarity with the Synoptics
(Eerdmans, 2012)

Simon Gathercole, The Composition of the Gospel of Thomas: Original Language and Influences
(Cambridge University Press, 2012; paperback 2014)

History/Commentary, 1983-1999

Stevan L. Davies, The Gospel of Thomas and Christian Wisdom
(Seabury Press, 1983, not in print; 2nd ed. with new intro, Bardic Press, 2005)

Marvin Meyer, The Gospel of Thomas: The Hidden Sayings of Jesus (HarperCollins, 1992)

Stephen J. Patterson, The Gospel of Thomas and Jesus (Polebridge Press, 1993)

Richard Valantasis, The Gospel of Thomas (Routledge, 1997)

Patterson, Robinson, and Bethge, The Fifth Gospel (Trinity Press, 1998)
(The best all-around introduction. If you buy just one book, this is the one.)

Risto Uro, ed., Thomas at the Crossroads: Essays on the Gospel of Thomas (T&T Clark, 1998)

John and Thomas

Gregory J. Riley, Resurrection Reconsidered: Thomas and John in Controversy
(Augsburg Fortress, 1995)

Elaine Pagels, Beyond Belief: The Secret Gospel of Thomas (Vintage Books, 2003)

April DeConick, Voices of the Mystics: Early Christian Discourses in the Gospels
of John and Thomas and Other Ancient Christian Literature
(T&T Clark, 2004)

Christopher W. Skinner, John and Thomas - Gospels in Conflict?
(Princeton Theological Monograph Series 115, 2009)

(a page of The Gospel of Thomas Resource Center, Nov 2012, rev Feb 2014)