No surprises here. I really good. This time, the plot is even better. There is a ton of action. There are many plot twists (which were my favorite parts of the book). I would probably give this book a 9.6/10. After two slightly weaker installments, this one comes up.
It doesn't have a clear ticking time bomb, unlike the previous three, but has its ways of still keeping things fresh and good. It may not be the best in the series, and it is not perfect, but is still definitely worth the read. The plot is amazing, though.
There are some very interesting characters (Daedalus being one of them), who really make it an engaging read.
It is slightly darker and a little more complicated, but it also has a lot of humor.
Overall, I loved this book, and, till now (I didn't read book 5 yet), it is my second favorite installment.