This book constitutes a selection of the thoroughly reviewed papers of two international workshops on Coordination, Organization, Institutions and Norms in Agent Systems, COIN@AAMAS [9] 2011, held in Taipei, Taiwan in May 2011 and COIN@WI [10]-IAT 2011, held in Lyon, France in August 2011. The papers are organized in topical sections on agent coordination, norm-aware agent reasoning, as well as...