I'm somewhere between a 3 and 3.5 with this one.
The world building and characters are well realized (the main ones at least). The plot is a little slow in the middle and really drags.
The mystery is nice and you want to keep reading to find out what happens.

I guess what really dropped this down into 'ok' territory is that the Silverfish/Amaya learned nothing in the end. Like she learned about her family and the secrets of Moray but she began the story on a ship wanting revenge and ends the story on a ship wanting revenge.

Cayo is another character that I wish had learned something. He was on the path of forgiveness and maturity then just gets swept away by characters that are bigger and more compelling than him. I also don't like how the chemistry between Amaya and Cayo was almost forced in the series.

It was worth the read but a let down since I was really looking forward to the book.