Complex sentence: The Mallville Public Library, (a play on Smallville, Superman's adoptive home town) the setting for "Unshelved", a good portion of the action in "Unshelved" happens either at it, or to it.
Split into simpler sentences: The Mallville Public Library, (a play on Smallville, Superman's adoptive home town) is the setting for "Unshelved". A good portion of the action in "Unshelved" happens either at it, or to it.