The Siren Song

I read the Siren Song by Anne Ursu recently. This is the sequel to The Shadow Thieves.  In the beginning of the story Zee and Charlotte  are grounded big time. At school she notices that Zee is always staring at Maddy, Charlotte's best friend. She asks Zee if he likes Maddy  and he answers yes. The next day Charlotte Finds out that Zee is now going out with Maddy. Charlotte gets home from that stressful day thinking nothing could go worse. She soon finds out that her parents are taking her on a historical cruise. Sounds like loads of fun, right. So some certain events, like at midnight a giant sea monster coming to eat your ship, lead to her having to get off the cruise to save the world, again.  She is trying to find Poseidon, the self-centered god of the sea. With Jason, a friend she met on the boat who knows about where Poseidon is, they venture to Poseidon's yacht. They get to the boat but run into many problems along the way.    Will Charlotte be able to save the world on her own? Read the Siren Song to find out.