BOOK REVIEW JACK BRUCE: COMPOSING HIMSELF By Harry Shapiro [Jawbone Books] Jack Bruce was arguably the most influential bass player of his time. One could easily make the case that it was his unbridled improvisational explorations with Cream in the late 1960s (along with bandmates Eric Clapton and Ginger Baker) that led directly to the birth of fusion music in the early ’70s. Before Jaco Pastorius, before Victor Wooten, there was no one flashier...