Goal Reasoning: Papers from the ACS Workshop (http://mcox.org/g-reason) Baltimore, MD 14 December 2013 Workshop Chair and Editors David W. Aha (Chair), Naval Research Laboratory (USA) Michael T. Cox, University of Maryland (USA) Héctor Muñoz-Avila, Lehigh University (USA) Aha, D.W., Cox, M.T., & Muñoz-Avila, H. (Eds.) (2013). Goal reasoning: Papers from the ACS workshop (Technical Report CS-TR-5029). College Park, MD: University of Maryland, Department of Computer Science. i