I'm always reading something, usually multiple books at a time.
I almost never give a book five stars. This book is practically a unicorn. Keep in mind that I gave the first book in the series a 2.5 rounded up to 3, and the second a solid three. This book blew me away.
One of the things that reeled me in, early in this installment, was dealing with a question that nagged at me when I read the end of Insurgent.
Spoilers for Insurgent follow in the next passage.
I was afraid that this would never be addressed, but it was!
I can totally buy the idea that people would consent to genetic modifications designed to make them better, more virtuous, more able, and just generally more. We have GMO foods--GMO people is not that big a leap. And of course, I can imagine that enterprise going very, very wrong.
I will say something about the end. I knew there was something controversial about it because on FB, Entertainment Weekly posted a link to an article entitled "'Allegiant' controversial ending: Veronica Roth speaks out." Plus I kept seeing hints of people's dissatisfaction with the book popping up in Goodreads discussions, to the point where I started avoiding discussions on the first two books out of fear of spoilers. Anyway, now that I've read it, I of course understand what was controversial about the ending.
In case you are at all wondering, I do recommend this book. If you've read the first two books--even if you liked them just enough to be curious to find out how the trilogy resolves itself--read this book! I know the characters and world of this book will sit with me for a long time. Talk about a "book" hangover. :)