Ok. I'm behind in the series so I don't know what has happened in the meantime between what I have read and now but I felt that there wasn't much that happened in this book 

There's Circe preparing for war on Olympus. Icarus is a captive of Poisiden because of something that happened with his dad and sister. Icarus decides to seduce Poisiden and Poisiden decides to give in for information on Circe, but also ends up liking being seduced. 

From the ending, where the trick they pulled on Circe doesn't pay off like they thought, I think there is a bigger battle of power to come in the next book.... But the ending was very anticlimactic. So I'm kind of disappointed in this but gave it 3 because I finished it.