Check out The Machineries of Empire series by Yoon Ha Lee. The first instalment (Ninefox Gambit) is one of my favorite books. The physics of the world is based

Check out The Machineries of Empire series by Yoon Ha Lee. The first instalment (Ninefox Gambit) is one of my favorite books. The physics of the world is based on an interesting "calendrical" system which relies on the population's faith in the calendar to persist.