In what used to be known as Chicago, society is now dived into five factions based on one ruling personality trait: Abnegation, Erudite, Candor, Amity and Dauntless. At the age of 16 all members of society must take an aptitude test to determine which faction they are most suited for. They can then chose to stay in the faction they were raised in, or chose to leave that faction - and their family - and join another faction. Beatrice was raised in Abnegation, where self-denial is the ruling characteristic, but she has never felt selfless enough for it. The day of the aptitude test, she finds out that she is a Divergent - someone who can test into more than one faction - but that she must hide this fact from everyone. She chooses to join Dauntless, the faction that values courage above all else.This was a great book. In a way it reminded me a lot of Holly Black's Ironside books. Not plot-wise, or even thematically per se, just in the grittiness and violence of the world depicted, and heroine who must define for herself what real courage is. It was also just as compulsively readable.I really loved the depth of the characters and their development, and how all the pieces came together. The plotting was really excellent. And I feel like the book also had the first romance that really got me excited in a very long time. I was really rooting for the couple, and their relationship didn't seem forced at all, like it often does in recent YA. I will definitely be picking up the next book.