Preternatural Too: Gyre By Margaret Bonanno

(Used, paperback)
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Karen Guerreri is an obscure writer of science fiction novels. She is half convinced that her invisibility-far from qualifying as a superpower in a world of mad-scientist villains-has simply left her alone and forgotten in the junk heap of literary black holes.
Her first attempt to write "real" books backfired with the unacclaimed Preternatural. In that book, she became confused as to whether she was creating the intergalactic jellyfish, which she was writing about, or if they were controlling her.
Karen addresses the question by writing a sequel and thus begins Preternatural Too: Gyre, quite possibly one of the most improbable follow-ups in history. Skipping in and out of this world and teetering on the edge of sanity itself, Gyre stands like the proverbial shout into the void, raising more questions in postmodern exploration than its predecessor.