When it does, I’m going to re-read the first three all over again because there were so many details I only vaguely recalled AND their just fun reads! (Although this might not happen as The House of Hades‘ scheduled publication is August 2013, but I hope to get the chance!)
From what I do recall from the first two books, this is definitely more action packed and definitely not lacking. However, in the end it was just as much a tease as the others. For the entire book I held out hope that some of the major plot lines of the series would be wrapped up, but only one of them was (which was definitely nice). I was, however, very glad that the seven demigods from the prophecy were finally together and the teen angst in the book definitely added to the plot (although I’ve yet to read an author who does teen angst as well as J.K. Rowling).