Book excerpt: Much has been researched and written about the emergence of improvisation processes within organizational contexts. Although still scarce, research on organizational improvisation has evolved from a jazz and theater metaphor to empirical and conceptual organizational frameworks, creating a consolidated organizational theoretical body. This Elgar Introduction discusses major theoretical advances in organizational improvisation, which the authors view as the process of improvisation that occurs within an organizational context, whether at the individual, team, or organizational level. Grounded in rigorous academic work to date, this book speaks both to scholars interested in developing research on organizational improvisation and to managers who face rapid change with crucial consequences.