Brownstone Burial - Paulette Palinsky Travel Mysteries, #2

1947 murders come to haunt Paulette Palinsky when she leaves her small town for the big city of New York in 1963 to escape her reputation of cavorting with spirits. She is starting a new career as an airline reservations agent when she finds herself falling in love with those wonderful old New York houses: Brownstones. Thrilled when she finds a small studio in one, she forgets how old they are and the secrets they may hold.
The first ghost to make contact used to be a NY detective and knows exactly what she needs to do to get the case reopened. Reluctantly, Paulette agrees, and learns that three murders happened that day in 1947, and that her landlord is the son of one of the ghosts and the nephew of the other two. He isn't happy with her poking her nose into his family affairs. Pauly finds herself sandwiched between the living and the dead, finding clues that soon involve the airline she works for.