The Agent by George Higgins
Super sports agent Alexander Drouhin, a handsome, ruthless, slick lawyer, and his motley support team inhabit a cut-throat world obsessed with money, fame, and power, so when Drouhin is found with a couple of .44 slugs in his head, there is no shortage of suspects. By the time Lt Francis Clay arrives at the crime scene, it appears that everyone has an alibi and no one has a clue.
More than a detective story, The Agent, is an unrelenting examination of a world in which no outrageous amount of money is ever enough and there is more to the game than just scoring points. George V Higgins, master of the literary thriller, turns his eye for detail and ear for dialogue to the seamy underside of the high powered, high dollar world of sports agenting.