Fortune favors the dead : a novel
(Book)

Series numeration from goodreads.com.

"When scrappy circus runaway Willowjean "Will" Parker saves the life of New York's best, and most unorthodox, private investigator, Lillian Pentecost, she doesn't expect to be offered a life-changing proposition: Lillian's multiple sclerosis means she can't keep up with her old case load alone, so she wants to hire Will as her right-hand woman. Three years later, in 1945, Will and Lillian are called in on the case of Abigail Collins, whose dead body has just been found slumped in the same chair where her steel magnate husband shot himself the year before. With rumors flying that Abigail was bumped off by the vengeful spirit of her husband, the family has tasked the detectives with finding answers. But that's easier said than done in a case involving messages from the dead, a seductive spiritualist, and the deceased's beautiful daughter, Becca Collins. When Will and Becca's relationship dances beyond the professional, Will finds herself in dangerous territory--and discovers she may have become the murderer's next target."--,Provided by publisher.