I'm surprised no one has said The Maid by Nita Prose yet. The entire book was a frustrating experience in how dramatic irony (and reverse dramatic irony) can be grossly overused in mystery novels--the narrator's "quirk" (never diagnosed but is coded as autism) is an excuse for her to miss all of the clues so plainly in front of her--an interesting premise for a mystery perhaps-- but then at the very end its revealed in a flashback that she literally witnessed who did it but sort of just, forgot?? and didn't think to mention it to us the entire time?? I have never in my life yelled at a book like this