Again, I lost my notes on The House of Hades. I vaguely remember comparing it to the Harry Potter series as I was reading this one.* While the book feels dangerous, I don't know that I ever believed any of the characters would die.
I like that we hear the story from several characters, but sometimes that does make for confusing reading. Especially since the characters aren't all together anymore.
*The comparison was unfavorable towards The Heroes of Olympus, but then the comparison was unfair to begin with. Very few series should be compared to Harry Potter.