The Widow of Rose House by Diana Biller (2019)

A scandalous widow in the 19th century buys a house in order to redecorate it and write a book about the process. By the way, the house is haunted and a very sweet scientist with a loving family wants to experiment and solve the mystery. 

BTW, Professor Samuel Moore is the most dreamiest book boyfriend ever. He's a ray of light and my dream date.

I flat out LOVED this book. Diana Biller is definitely on my authors to follow list.

See also the novels of Simone St. James for this blend of spookiness and romance.