This is the third book in the Robot City series, which is based in Asimov’s Foundation universe. This one follows Odyssey and Suspicion, and is a pretty good book. Its also a very fast read.
The robot-wandering-the-city subplot is very reminiscent of Caliban, which is yet another Asimov spinoff. The plot lines are different enough that it doesn’t feel like a rehash, but there are certainly strikingly similar elements.
I liked this book.
Cyborg: Isaac Asimov's Robot City, Book 3, by Wu, William F.