Graver, Lawrence and Raymond Federman, editors, Samuel Beckett: The Critical Heritage, Routledge and Kegan Paul, 1979.

The entire volume is a collection of original reviews of Beckett's work; the section on Krapp's Last Tape features both a positive and negative review.

Knowlson, James. Damned to Fame: The Life of Samuel Beckett, Simon and Schuster, 1996.

Knowlson's exhaustive biography explores the ways in which Beckett's life in Ireland and France affected his work. Knowlson also treats Beckett's service to the French Resistance in great detail.

Knowlson, James, editor. The Theatrical Notebooks of Samuel Beckett Volume III: Krapp's Last Tape, Grove Press, 1992.

This volume features the entire text of Krapp's Last Tape as well as a facsimile of Beckett's notebook in which he kept his ideas (written in French) about how he wanted the play to be directed and performed.

O'Brien, Eoin. The Beckett Country, The Black Cat Press, 1986.

This...