Favorite book in a series.
This one is a toss up between Mockingjay and Deathly Hallows.
Both tie up their series nicely. Both kept my attention all the way through. Both were much better books than movies.
If I really had to choose one, I’d go with Mockingjay. I think, though, that it’s because I read it more recently. And I read the whole series back to back.
The Harry Potter series was read as they were published, so they were spread out over a longer period of time. And there were a lot more of them.