"Mirabile" by Janet Kagan is actually three short stories put into one book.
Asimov magazine has compiled the short stories they have published into annual anthologies, too.
There are anthologies published all the time, collections of short stories in single volumes (or multiple volumes, like "Dragons of Darkness" and "Dragons of Light", companion volumes of short stories edited by Orson Scott Card and about - wait for it - dragons. Including a funny "St. George" story in the latter volume.)
And we have a collection of short stories in our library, right here.....
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