I read the first in this series, Glow, a while back and decided to read it again before starting on Spark. I started it Saturday morning and finished it Sunday morning. I was then very excited to start on Spark. However, this one then took me a week to get through. Not that it was necessarily bad, it just wasn't as fast paced and thriling as the first.
That said there are many excellent elements that make up the story, which is why I gave it 4 stars. I was intrigued by the changing relationships between Waverley, Kieron and Seth and how the other children on the ship interact with each other. I thoroughly enjoyed the ethical and moral dilemmas that both ships face.
I am hoping that this has set up for an explosive finale in the final installment and that the resolution is satisfying.