And then there is the appendix. You have turned the last page of Lucy Ives’s intricate, darkly funny debut, and a curious timeline appears. Have you missed a plot point or two or 10?

Everything changes for 12-year-old Samantha McGinty in the summer of 1969. Her father, Brick, stops fussing over his Chevy each weekend, no longer spritzing the windows with water and vinegar and wiping them clean with old pages of the Erietown Times.

Language is failing Beryl Dusinbery. She is 99 years old and having trouble retrieving words. “One minute she has a word, then she hasn’t. Where does it go?” Conversely, Shimi Carmelli, 91, can’t forget.