Neal Stephenson, of Snow Crash fame, has produced his best work ever.
Like much great fiction, it starts with a character in a very insular, closed little world and gradually expands his horizons to reveal his place in the community, society, world and cosmos around him.
It’s set on another planet, Arbre, eerily like Earth, where 3700 years ago a near nuclear war caused all the scientists to be sent to monastery-like institutions, and periodically made not to pursue certain areas of study, like DNA sequencing.
Then comes a mystery that will change this world forever, and Fraa Erasmas, a novice avout (scientist/monk) is at the center of it all.
The adventure includes thought-provoking discussions on the nature of consciousness and parallel cosmoses (by definition, they can’t be universes in the plural!), along with some great suspense and page-turning action.