George E. Lewis, Edwin H. Case Professor of American Music at Columbia University, is a fellow of the American Academy of Arts and Sciences, a MacArthur Fellow, a Guggenheim Fellow, and author of the award-winning 2008 book, A Power Stronger Than Itself: The AACM and American Experimental Music.Benjamin Piekut, Associate Professor of Music at Cornell University, writes on the history of experimental and improvised music after 1960. He is the author of Experimentalism Otherwise (2011) and editor of Tomorrow Is the Question (2014).

• Preface to Volume II IntroductionGeorge E. Lewis and Benjamin Piekut I. Cities 1. Improvisation Technology as Mode of Redesigning the UrbanChristopher Dell and Ton Matton 2. Lots Will Vary in the Available CityDavid P. Brown 3. Improvising the Future in Post-Katrina New OrleansEric Porter II. Creativities 4. Billy Connolly, Daniel Barenboim, Willie Wonka, Jazz Bastards, and the Universality of ImprovisationRaymond MacDonald and Graeme Wilson 5. A Computationally Motivated Approach to Cognition Studies in ImprovisationBrian Magerko 6. A Consciousness-based Look at Spontaneous CreativityEd Sarath 7. In the Beginning, There Was ImprovisationBruce Ellis Benson III. Musics 8. Landmarks in the Study of Improvisation: Perspectives from EthnomusicologyBruno Nettl 9. Saving Improvisation: Hummel and the Free Fantasia in the Early Nineteenth CenturyDana Gooley 10. Negotiating Freedom and Control in Composition: Improvisation and Its Offshoots, 1950 to 1980Sabine Feisst 11. Musical Improvisation: Play, Efficacy, and SignificanceA. J. Racy 12. Improvisation in Freestyle RapEllie M. Hisama 13. Speaking of the I-WordLeo Treitler IV. Writings 14. Modernist ImprovisationsRob Wallace 15. Diversity and Divergence in the Improvisational Evolution of Literary GenresJennifer D. Ryan 16. Improvisatory Practices and the Dawn of the New American CinemaSara Villa 17. Brilliant Corners: Improvisation and Practices of Freedom in Sent for You YesterdayWalton Muyumba 18. Improvisation in Contemporary Experimental PoetryHazel Smith V. Media 19. Subjective Computing and ImprovisationD. Fox Harrell 20. Improvisation and Interaction, Canons and Rules, Emergence and PlaySimon Penny 21. Imposture as Improvisation: Living FictionAntoinette LaFarge 22. Role-Play, Improvisation, and Emergent AuthorshipCelia Pearce 23. Bodies, Border, Technology: The Promise and Perils of Telematic ImprovisationAdriene Jenik 24. She Stuttered: Mapping the Spontaneous MiddleSher Doruff VI. Technologies 25. Live Algorithms for Music: Can Computers Be Improvisers?Michael Young and Tim Blackwell 26. Improvisation of the Masses: Anytime, Anywhere Mobile MusicGe Wang