Harlow, Essex: Copula, 1995. First edition. Wrps., 191pp. (no hardcover issued). Prévost documents the history and underlying philosophy of free improvisation and, in particular, AMM, the ensemble he co-founded in 1965 with Lou Gare and Keith Rowe, later augmented by Lawrence Sheaff and Cornelius Cardew. The book is divided into three main sections: AMM and the Practice of Self-Invention; Meta-Musical Narratives; and Essays, with appendices providing a chronology, discographies, and bibliographies. Fine.