By now if your thinking of reading this book you already committed to the series. A different tone than the previous books and we get to see the rest of the world the previous books built. This is much more focus on the politics and media manipulation on both sides. 
 It's rare to see a popular book series show the brutal consequences to ones mental health of living through a tragedy. This book really explores the trauma, P.T.S.D and mental repercussions on Katniss. Hopefully your use to being inside the girls head because it pretty messed up at this point. 
 This is not a clean tying up of lose ends. There are twists and turns, surprises you may not see coming but can be understood. 
 A great end to a series, staying true to what came before while keeping it fresh.