This is the sequel to Divergent, which I enjoyed very much. I thought this was a very worthy follow up and strong second book in a trilogy, complete with a big reveal at the end that things had been leading up to (what’s behind the fence?!) The action of this book picks up literally moments after book one ended. The divergents have been revealed, there is warring between the factions, and it’s more apparent than ever that big secrets are at the foundation of this society. Tris is especially haunted by the murder she committed, even though it was necessary, and it drives a wedge between her and the others. I really don’t remember many more specifics to give much of a summary, just that this had good action and was really solid.