I read all the other books except for the Tower of Nero.
But I'm just gonna say that the whole series is really good and anything Rick Riordan writes is awesome. Btw Leo is one of the best people in the series and no one can convince me otherwise.
If buck is ambitious about something, then he really seeks to do it, such as a goal. Make sense? Can you raise me up to a higher rank??? Please and thank you!!!