The Birthday of Eternity - Comfort & Company, #2

L. A. private investigators Kit and Henry become entangled in the city's robust post-WWII occult trade when they're hired to track down Lillian, the estranged wife of a prominent physician, and her spellbinding "spirit" lover Tashin. Fresh from her training in judo and "dirty fighting, " Kit poses as an eager recruit at a Hollywood cult run by the ambitious Reverend, while Henry takes on the city's séance circuit, which has reinvented itself in the wake of war.
Assisting them are Kit's psychiatrist lover Luca and her combat veteran brother Stanley, who offer their own brand of expertise in unraveling the tricks of the conmen. Plunged into the strange and deadly world of mediums and gurus, Kit and Henry soon discover that surviving the spirit trade will take all of their cunning and a whole lot of luck.