This is a decent thriller that relies heavily on references to 1940s and 50s noir like Rear Window — the main character spends her time watching old movies and spying on her neighbors. Due to a combination of psych drugs, alcohol, and people lying to her, to call her an unreliable narrator would be an understatement. Gaslight definitely comes to mind, as does the much more recent The Girl on the Train.
“I think of Dr. Brulov in Spellbound: “My dear girl, you cannot keep bumping your head against reality and saying it is not there.”
So Anna Fox, our main character, spends her days hanging around the house. She drinks a lot of wine, watches a lot of movies, and refuses to step out of her front door. She has something very traumatic in her past that’s slowly revealed over the course of the book. She’s separated from her husband and child, and her only contact seems to be delivery services and phone calls from her psychiatrist. Then one night, she’s watching the new neighbors through the window, and thinks she sees a murder.
Like I said, the set up is very Hitchcock. Anna makes things as hard as possible on herself — she randomly takes handfuls of meds, washed down with a bottle of wine. She’s always stumbling through her house, spilling things and talking to herself. But it’s also obvious that something else is going on — someone is messing with her, lying to her. It’s a very twisty novel, so if you like that sort of thing, you’ll like this.