1951 scifi from novel Isaac Asimov, one of three of the Galactic Empire series, the second published but chronogically the first.
About 201 standard pages.
First read (31st January - 22nd February 2014)Edit
Read it shortly after finishing Pebble in the Sky. At first I was nonplussed, it seemed fairly boring and silly, but once I started to twig that the main character was actually a pretty smart guy I started enjoying it a bit more. Actually might qualify as 'rationalist' fiction.
Previous book: Isaac Asimov, Pebble in the Sky
Next book: Isaac Asimov, The Currents in Space