Lightning Runes — Harry Turtledove

All your favorite characters from Twice as Dead are back in this exhilarating follow-up to the first book in the City of Shadows series. Jack Mitchell, the hardboiled ex-military private eye is asked to help muisician Oscar Ricks investigate Grampus Records (which he hopes to do while avoiding with the very unpleasant mob the rules this alternate 1940's Lost Angeles where the undead and dead co-exist). Jack's complicated personal life also intertwines with the case, making the issue even more complicated. As he dives deeper into his investigation, he encounters danger at every turn, from physical altercations to supernatural threats. To survive, let alone solve the case, Jack must rely on his wit, experience, the help of unlikely allies, and his street-smart instincts, to navigate the volatile world of mobsters, magic, and personal loyalty.