Crossing Bar Lines : University Press of Mississippi : 9781496832115 : 1496832116 : 30 Mar 2021 : "In Crossing Bar Lines: The Politics and Practices of Black Musical Space James Gordon Williams reframes the nature and purpose of jazz improvisation to illuminate the cultural work being done by five creative musicians between 2005 and 2019. The political thought of five African American improvisers-trumpeters Terence Blanchard and Ambrose Akinmusire, drummers Billy Higgins and Terri Lyne Carrington, and pianist Andrew Hill-is documented through insightful, multilayered case studies that make explicit how these musicians articulate their positionality in broader society. Informed by Black feminist thought, these case studies unite around the theory of Black musical space that comes from the lived experiences of African Americans as they improvise through daily life. The central argument builds upon the idea of space-making and the geographic imagination in Black Geographies theory. Willia