Using Judas Iscariot as the primary case study, this book examines the nature of human betrayal. We begin with the basic question as to why Judas would have betrayed Jesus, who was, theoretically at least, a friend of his. In pursuing this enquiry, we will need to consider a broad range of possibilities as to what sort of disciple Judas really was, and what made him tick. Then, as the book unfolds, we launch out into broader understandings of betrayal and other biblical examples. Also included is a chapter on how the character of Judas has been seen in more recent times. The book concludes with some thoughts on recovering from betrayal, and advancing in discipleship such that we would never betray others.