Staub, Wendy Corsi. Lily Dale mystery

Series information from www.goodreads.com

In the quirky, picturesque lakeside community of Lily Dale, where the residents can talk to the dead, young widow Bella Jordan is the lone skeptic among believers. She doesn't believe in ghosts, but after a year in the village, she would admit that her new friends do sometimes seem to know impossible things. Still, when a Black stranger dressed in old-fashioned clothing arrives unexpectedly at Bella's guesthouse at midnight on Juneteenth, only to vanish the next day as if he'd never existed, Bella's sure there has to be a logical explanation