The Closing Web — Marjorie Harte

Lucilla, fiction editor of a popular women's magazine, found her career completely satisfying until she succumbed to the charms of a handsome free-lance artist and added matrimony to her agenda. Unhappily, disillusionment soon set in, sorely trying her sense of loyalty, which was still further strained by the advent of a sinister stranger who brought the stark drama to a climax.