Now that she is 16, Beatrice goes through the aptitude testing that will tell her what faction she belongs in, and the choosing ceremony, where she makes the decision that will determine the rest of her life. Her testing results are unusual: she could easily fit in any of three factions. She can stay with Abnegation, where she grew up, move to the brilliant Erudite, long-standing rivals of Abnegation, or abandon her family and become Dauntless, the brave. She chooses this last option and begins training, unrelentingly physical training, preparing for careers in border patrolling or government security. Her surprising aptitude makes her at least one enemy, who is determined to destroy her. As the initiates move deeper into their training, Beatrice--now Tris--uncovers surprising information about factions--and family--that will affect the whole society if Tris does nothing. 
 I really, really enjoyed this one, way more than I have the recent crop of dystopian romances. Yes, there's a romance here, but it's not the main thrust of the plot. It's not the character's main goal. She still has other priorities (survival, for one) and recognizes that her potential relationship is probably a bad idea. 
 Dystopian in that there's something of a caste system and inter-faction rivalries and superiorities, plus government conspiracy and plotting. The future-Chicago setting isn't a big factor in the story (locations could be virtually anywhere; or maybe I'm just not well versed in Chicago geography). Adults are mysteriously absent, unless they're evil supervillains plotting in other factions or parents who have been abandoned (and thus jettisoned from the plot). Really, it's the social system that makes this a dystopia, similar to the districting of The Hunger Games or the classes of Brave New World, though without the same hierarchy. 
 8th grade and up; the brutal training will give it both boy and girl appeal.