Harry Potter books, e.g. (9)

I believe the answer is:

fantasies

(Other definitions for fantasies that I've seen before include "Imagination unrestricted by reality" , "Daydreams or products of the imagination" , "Sea faints might be pipedreams" , "Pleasant daydreams" , "Pipe dreams, illusions" .)

I've seen this clue in The Wall Street Journal.

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