What building has the most stories?

“Skyscraper”

While skyscrapers are tall buildings with many floors, the term 'stories' in the riddle is a play on words referring to the narratives found in books, making a library the correct answer.

“Hotel”

Hotels often have multiple floors and can have many different guests or 'stories' about them, but the riddle specifically refers to the literary 'stories' found in a library.

“Office Building”

An office building may have numerous floors or 'stories', but again, the riddle is using 'stories' in the context of books, which relates specifically to a library.