well...
I owuld be cautious with a book like this, and just to offer full dislosure, there is some bad blood between myself and Ingrid - she tends to have a classic academic perspective, long on sociology and short on real musical understanding, with a lot of PC stuff thrown in from the perspective of race. I listened to one of her lectures years ago on music and Civil Rights at some conference, and Dan Morgenstern, who sat beside me, whispered a correction in my ear every time she made a mis-statement.
As for that bad blood, I have long battled against academia on the Jazz Research internet group (run by the esteemed and now absent-from-organissimo Michael Fitzgerald) and she got furious when I made certain criticisms of Sherry Tucker's book Swing Shift (which presents the novel theory that Billie Holiday was ashamed of her blackness) -