"A Pair of Docks" is not (exactly) "a paradox," as I thought.
It is literally a pair of docks. Which may or may not be able to cause or prevent a paradox.
and now I have to wait until November 10 to find out what happens next.
(I can wait, but it won't be easy.)
the book ended in a good place. There is a resolution for the current storyline, while relaying a sense of urgency for impending events.