The Guardian of Detritus by Chuck Snearly

Something snaps when failed rock musician and disgraced reporter Will Harkanen reads an obituary for an old friend who died in a car crash in Detroit. On the far side of middle age and the brink of divorce, Will quits his boring job to reconnect with his past and pursue the dreams of his youth. In doing so he unravels an ugly mess of blackmail, bribery and corruption that may have led to his friend's death. As Will chases his dreams, he realizes too late that his dreams are chasing him.