A book from the 1970s, I think. I read it in the late 80s or early 90s. It centers on a teenage girl whose name *might* have been Margaret or Marguerite – not quite sure though. Her parents were super weird, and I think her family was kind of weird too. Her dad I think was kind of bald on top but grew out his hair on the back and sides. I think there may have been very brief black and white sketches too. Weird things I can remember that they did: sing opera in the back yard, have mattresses for furniture instead of real furniture, they also did a backwards progressive dinner one night (where they ate desert first and worked backwards to the appetizers) and brought home some kind of shrimp appetizers for the kids to eat, which was great for the kids because they had accidentally burned the pizza they ordered in the oven because the left it in the cardboard box and almost started a fire. I think she eventually learned to accept the quirkiness. Also, I think her siblings were kind of weird too and that she considered herself the only “normal” one. I don’t think it’s “Mom, You’re Fired,” nor do I think it’s “Me and Fat Glenda.” Neither of those descriptions seem to match. Thanks!