User blog comment:SayuriDarling/The Blood of Olympus Official Discussion/@comment-3146930-20141013211630/@comment-3146930-20141014224931

However if those events will come up in a later book, I would feel kind of cheated. You can't have all these things built up in a 5 book series and yet not give them clear conclusions by the end. Even a companion book wouldn't be so bad. The main reason I didn't like this book as much as I could have is because of the lack of closure and as a result, this book didn't feel like the final one in the series. That also reminds me:

Apollo's Punishment
Zeus punished Apollo as a result of him allowing the Oracle to speak the Prophecy of Seven. As a result, Zeus feels this caused the events of the prophecy to unfold faster. So lets look at this for a second:
 * The Romans have had this prophecy on a stone floor basically forever.
 * Hera was training Leo to take on this role before the prophecy was spoken on the Greek side.
 * Gaea has also been trying to raise her children well before the events of either series. On fact part of her take-over came about as a result of the first Great Prophecy with the gods and their children fighting each other.

This could just be Zeus being Zeus, but this is a big punch to the face for me.