A thought-provoking tale that doesn't quite fit the novelette form.
In the preface, Blish mentions that The Quincunx of Time began life as a short story titled Beep. He was encouraged by his editor Larry Shaw to extend the plot to long prose form. As I understand it, this mostly involved surrounding the core concept with a lore-deepening framing device. While it did add value to the story, I feel that connection is loose.
Focusing on the plot itself, this is mostly concerned with explaining the concept of the Dirac Transmitter, a communications device used to pass on information across the gulf of space. However, when Captain Robin Weinbaum learns from journalist Dana Lje that a transmission has been intercepted by a rogue agent, the ensuing investigation leads to discovering an exciting new feature of the device that will improve government efficiency, provided that those in charge can maintain full control of it.
Essentially The Quincunx of Time leads on its sci-fi premise and theme of communication. The characters, while quippy lateral thinkers, are essentially mouthpieces for a greater debate. The twists create engagement but they also reinforce antiquated gender roles and, indeed, stereotypes. Overall it feels like Blish broadened the story with adornments that just about balance around each other without ever really joining up.
That being said, I really enjoyed the ideas that powered this story. When it comes to sci-fi, I can forgive one-dimensional characters and unabashed Socratic dialogue for a well-crafted paradigm shift. The Quincunx of Time certainly has its storytelling failings, but I nevertheless found it a pleasing short book.
I recommend it to like-minded readers and Blish completionists.