Allegiant is a really interesting novel by Veronica Roth. You need to read the first two books, Divergent followed by Insurgent.
I like how the writer changes the settings; from the Dauntless/Erudite/Candor compound to our world. The story got really funny when the characters tried to figure out the things about our world. (In their world, they are split into 6 different factions: Dauntless, the bravest people. Abnegation, the nice people. Candor: The trustworthy people. Amity, the caring and hardworking people. Erudite, the smart people. Lastly, the factionless. They are the poor people who got kicked out of their factions).
The genre is a fantasy and fiction book.
You would enjoy this book if you like adventures and mysteries.