This book constitutes the refereed proceedings of the Second International Conference on Interactive Digital Storytelling, ICIDS 2009, held in Guimar?es, Portugal, in December 2009. The 19 full papers, 11 short papers and 5 poster papers were carefully reviewed and selected from 89 paper and poster submissions. In addition, the volume includes 4 invited presentations, 6 demonstration papers, and five workshop papers. The full and short papers have been organized into the following topical sections: evaluation, experiencing, and case studies; authoring tools and the creation process; games and story; theoretical perspectives; tools, applications, and frameworks; narrative control and drama management; and approaching novel perspectives and experiences.