Michaels Barbara. The Dark on the Other Side

Thriller novel by American writer and Egyptologist Barbara Mertz (b. 1927), who writes under the pseudonyms Elizabeth Peters and Barbara Michaels.
The house talked; Linda Randolph could hear it. The objects in it talked, too, but the house's voice was loudest. Linda was afraid that, as her husband suggested, she was losing her mind. Either that, or her husband was involved with dark, brutal forces beyond the limits of human sanity.
About Barbara Michaels:
Elizabeth Peters (writing as Barbara Michaels) was born and brought up in Illinois and earned her Ph.D. in Egyptology from the University of Chicago ’s famed Oriental Institute. Peters was named Grandmaster at the inaugural Anthony Awards in 1986, Grandmaster by the Mystery Writers of America at the EdgarÆ Awards in 1998, and given The Lifetime Achievement Award at Malice Domestic in 2003. She lives in an historic farmhouse in western Maryland.