While a great deal of psycho-legal research has focused on the trial process—and the decision making of jurors and juries, in particular—trials are not reflective of the current system of justice in the United States. Instead, we find ourselves within a system of pleas (Lafler v. Cooper, 2012) with a scarcity of social science research available to guide us. With this volume, we hope to integrate the current plea bargaining research that informs the field, from charging and defendant decision making, to attorney influences, to the ramifications at the larger system and institutional levels. Spanning multiple disciplines, the research and theories related to plea bargaining have much to contribute to public policy and to changes that individual actors (e.g., defense attorneys, prosecutors, and judges) may decide to incorporate in their daily interactions within our system of pleas.