As part of the Signet Classics Shakespeare Series edited by Sylvan Barnet of Tufts University, this edition includes commentaries on both plays as well as up-to-date production histories.

Shakespeare: Titus Andronicus/Timon of AthensShakespeare: An Overview
Biographical Sketch / A Note on the Anti-Stratfordians, Especially Baconians and Oxfordians / The Shakespeare Canon / Shakespeare's English / Shakespeare's Theater / A Note on the Use of Boy Actors in Female Roles / Shakespeare's Dramatic Language: Costumes, Gestures and Silences; Prose and Poetry / The Play Text as a Collaboration / Editing Texts / Shakespeare on the Stage

Introduction to Titus Andronicus
The Most Lamentable Roman Tragedy of Titus Andronicus
Textual Note
A Possible Source of Titus Andronicus: The History of Titus Andronicus

Commentaries
H. T. Price From The Authorship of Titus Andronicus
Richard David Dreams of Eale
Sylvan Barnet Titus Andronicus on Stage and Screen

Introduction to Timon of Athens
The Life of Timon of Athens
Textual Note
The Sources of Timon of Athens
Lucian Timon
Plutarch From The Lives of the Noble Grecians and Romans
William Painter From The Palace of Pleasure

Commentaries
William Richardson On the Dramatic Character of Timon of Athens
Roy Walker From Unto Caesar: A Review of Recent Productions
David Cook Timon of Athens
Susan Handelman Timon of Athens: The Rage of Disillusion
Maurice Charney Timon of Athens on Stage and Screen

Suggested References