Kept my interest more than the first book (which took me something like three months to get through), and felt more coherent overall, but still... meh.
It's not that there's anything wrong
with this series; it's a fairly decent upbeat adventure/mythology for the young readers, much like the Percy Jackson books, but unlike the Percy Jackson books, I just don't care
about either of the brother-sister protagonist team. They weren't quite as irritating as I remember them being in The Red Pyramid
, but I really don't care whether they live or die, succeed or fail, so... yeah. That's the biggest problem with this series for me, and I don't know if I'll bother with the third book.