Mark as Story Second Edition Important work on Mark that also works well at the popular level.
Mark and Method: New Approaches in Biblical Studies Provides a variety of approaches to Mark. I especially like Moore's deconstructive chapter and Fowler's reader-response one.
Let the Reader Understand: Reader-Response Criticism and the Gospel of Mark Fascinating and provocative
A Master of Surprise A bit dated but still an excellent introduction using a reader-response approach
The Genesis of Secrecy: On the Interpretation of Narrative (The Charles Eliot Norton Lectures) A classic dealing with the Gospel of Mark
Augsburg Commentary on the New Testament Mark A popular-level commentary backed by solid scholarship
The Gospel of Mark: Interpreting Biblical Texts Series
Sacra Pagina: The Gospel of Mark
Mark 1-8: A New Translation with Introduction and Commentary Scholarly and thorough
Mark 8-16 (The Anchor Yale Bible Commentaries) Scholarly and thorough
The Gospel of Mark: A Commentary
Mark (Interpretation, a Bible Commentary for Teaching and Preaching)
The Gospel of Mark (The New International Greek Testament Commentary) Assumes knowledge of Greek, somewhat more technical
The Gospel of Mark: A Socio-Rhetorical Commentary
Marked A fascinatingly different approach to the Gospel of Mark
A reading guide to the gospel of Mark This is my own publication. Preview and order it at: www.CrossMarks.com