Invited Talks.- Is Computational Complexity a Barrier to Manipulation?.- Games, Norms and Strategic Notions in Information Flow Security.- Group Announcements: Logic and Games (Abstract of Invited Talk).- Strong Equivalence in Argumentation.- Regular Papers.- Hypergraphs of Multiparty Secrets.- Combining Logics in Simple Type Theory.- Speculative Abductive Reasoning for Hierarchical Agent Systems.- Formal Semantics of a Dynamic Epistemic Logic for Describing Knowledge Properties of ?-Calculus Processes.- What Happened to My Commitment? Exception Diagnosis among Misalignment and Misbehavior.- Verifying Business Process Compliance by Reasoning about Actions.- From Organisation Specification to Normative Programming in Multi-Agent Organisations.- Finding Uniform Strategies for Multi-agent Systems.- Playing Extensive Form Games in Parallel.- Exploring the Boundary of Half Positionality.- Proof-Theoretic Analysis of Rationality for Strategic Games with Arbitrary Strategy Sets.- An Agent Language with Destructive Assignment and Model-Theoretic Semantics.- Model Checking Agent Programs by Using the Program Interpreter.- A Dialogue Games Framework for the Operational Semantics of Logic Agent-Oriented Languages.