** spoiler alert ** 
 At the end of Matched, Cassia was off to the Outer Provinces in search of Ky, hoping to catch up to him and be reunited. In her travels she learns of the rebellion brewing, and finding Ky will lead her to the rebels she desperately wants to join. Meanwhile, Ky has his own opinions, and Xander may be more of a player in the story than his limited screen time would suggest. 
 The POV switches between Cassia and Ky, but there's no shift in voice between them, making it difficult to keep track of whose head we're in. I expect book 3 will rotate among Cassia, Ky, and Xander. 
 On the whole, the book is plagued by Middle Child Syndrome--nothing happens; it's all just setting up the eventual action for Book 3. Lots of mooning over each other and ruminating on love and societal matches, but not much discussion of Society in general. (Also, no discussion of what they're rebelling AGAINST, exactly: the wars in the outer provinces? Matching? They're still perfectly content to take food and medicine that Society drops in from time to time.) 
 Overall: blah. Maybe the third book will help, but I'm not super-inclined to read it.