It turns out the book is not a trilogy after all - it's a fiveogy. (I'm not sure what a series with 5 books is called, so I made that up. Obviously.)
I'm slightly relieved because I was embarrassed for her that the ending to her series was so terrible. But that also means I have to read two more of these books since I'm already invested in them. It's not that they're terrible - they move fast and the author's a good storyteller. Since they target teenagers, all the melodrama is more than my bitter, cynical 30-something soul can take.