For some reason, it took me awhile to get into this book, but I'm glad I stuck with it. I guessed some of the things that happened at the end (view spoiler)[that Kalden was Ty and that Mae was not going to betray the Circle (hide spoiler)], but it still had good reminders about privacy and technology and secrets, a la 1984 and Brave New World. My favorite quote: 
 We are not meant to know everything, Mae. Did you ever think that perhaps our minds our delicately calibrated between the known and the unknown? That our souls need the mysteries of night and the clarity of day?