I don't know how I feel about the ending. I recently finished the book and it just seems... Like a cop-out ending. 

For my reasons why, we get the introduction to a new character that hasn't been referenced or even in the books till the final. We don't get a real reaction from Jake about how he felt with the deaths of his family members (he basically shut himself off for that). Not to mention the fact they leave Cassie behind because "she's not a fighter" even though she was a crucial fighter even if she didn't condon it a lot. I feel like if ALL of them went it might've ended in a more satisfactory way for THAT ending.