And Then There Were 23: After the Funeral by Agatha Christie
b"We both adored this (somewhat) unsung Christie gem... though not without reservations. Fortunately, for purposes of discussion, those reservations turned out to be slightly different. It's a truth universally acknowledged that every unhappy family is unhappy in its own way, and that certainly holds true for the various familial arrangements portrayed so vividly in this sprawling novel."