A good book, YA focused, the beginning of a trilogy. I enjoyed it enough to want to read the sequel.
For world building… somehow the world was messed up, probably involving corrupt politicians. From that fallen world, society organized itself into five factions (plus the leftovers)–each with a high minded goal and a widely acknowledged vice. Tris, our viewpoint character, grows up as a member of Abnegation–a service/charity focused faction that tends to the downtrodden… and runs society, since they personify selflessness.
This book is set in a fallen Chicago; prosperity is long behind, and communication, much less travel beyond the city appears strictly limited. A few chapters in, the students (who are 16?) are subjected to a hallucinatory experience that guides them to the faction that fits them best. Except that Beatrice is one of the (rare?) few who is Divergent–not strongly inclined to one faction. She learns that’s a dangerous place to be… and the rest of the book reinforces the need to conform and fit in.
Once I complete my current checked out books, the sequels will hop to the top of my queue…