Yes I do have a good reason as to why this book has 4 stars instead of 5. And no it has nothing to do with Percy not being in the book. The real good reason is that...uhhh...ummm...actually it's.... 
 I give up. 
 The reason this has 4 stars is because there was no Percy. I missed Percy! And that is the only reason. I was debating if that is fair or not. Mehhh I had to do it. 
 Apart from Percy Jackson not being in the book this was an amazing story as always. All the praise to 
 Rick Riordan 
 !!! 
 You can check out my reading progress too ;)