Magic of Moonlight - Tracy Brogan

From USA Today, Wall Street Journal, and Amazon bestselling author comes the next book in her witty, whimsical, wonderful gilded age series: The Bostwicks of Trillium Bay.
Trillium Bay, 1889 Alexander Bostwick doesn't believe in ghosts - but the unexpected death of his bride has him feeling haunted. The lingering scent of her perfume - along with her personal possessions popping up in the most peculiar places - has him worried he's lost his senses as well as his wife. With half of Chicago feeling sorry for him, and the other half suspecting he had a hand in her demise, Alex escapes to Trillium Bay, hoping peace and quiet might ease his troubled mind.
Progressive, pragmatic, Gertrude Hart has a medical degree from the University of Michigan but establishing herself as a capable physician has proven more arduous than passing her final exams. Her mother thinks a summer at the Imperial Hotel will convince Trudy it's time to relinquish medicine for matrimony - but Trudy isn't interested in marriage and intends to steer any suitable suitors toward her prettier, more marriage-minded sisters - and away from herself.
Her strategy seems fool proof...
Until Alexander Bostwick captures her sister's attention. Rumors swirl around the handsome, enigmatic widower, so before he can break her sister's heart - or worse - Trudy vows to learn the truth by any means necessary. But her ploy to gain his trust has unexpected consequences. When Alex confides he doesn't want a new wife - he wants to stop being pestered by the old one - Trudy decides to help, and together they work to unravel the mystery behind the spectral shenanigans that have followed him to Trillium Bay. Late-night encounters, counsel from self-serving mediums, and a séance gone horribly awry provide Alex and Trudy with some answers - but it's the magic of moonlight which leads them to the most important discovery of all - each other.