"Ben Doldrums, are you sad? Are you mad? Are you confused?" Frida Bellows lives in a big house made up of four apartments. Every morning, she gets on her father's shoulders and taps on the ceiling with a broomstick. This wakes her neighbor, a student named Ben Doldrums who knocks on the wall to wake the Mercredis, who in turn knock on the floor to wake the Reynolds. Frida likes this morning tradition. It makes her feel like...