Richard Cook, It’s About That Time: Miles Davis On and Off The Record (Oxford). Yes, another book about Miles Davis. Neither a biography nor a discography, Cook’s book has elements of both. The best way to read it is sitting next to your CD player with the fourteen Davis albums Cook analyzes as points of departure in considering the trumpeter’s career and importance. It would be helpful to also have the 105 others that he references. Whether or not you do all that listening, Cook is a reliable and stimulating guide through Davis’s five decades of changing music and persona.