As for picture books, such depictions seem even more rare. Amy Schwartz's A Glorious Day portrays the daily activities of the residents of a low-scale Brooklyn apartment building. What Happens on Wednesdays, Nana in the City (where a boy becomes reconciled to his grandma living in the city, but still doesn't want to live there himself!), the books of Ezra Jack Keats, Gina, a little known out-of-print gem by Bernard Waber about a tomboy who lives in Queens also come to mind. (Speaking of which, the latter, Mark Goldblatt's books, and How Pizza Came to Queens are the only children's books I have found set in Queens.) Some others, like Tar Beach, feature apartment dwellers, but that fact plays little to no role in the story.
What children's fiction can you think of where the protagonist lives in an apartment? Is there non-fiction about apartment buildings that I've missed?
Is it me, or do way more children's book protagonists live in houses than apartments?