Wow - a mystery on top of a mystery!

A girl on an island. A girl on a floating city. Both searching and seeking. Each isolated in their own way but determined to make a change. This is a gripping first read and sounds so interesting. Science Fiction is such a favorite genre but can be tricky to do well. The cover doesn't seem to fit the vibe of the first part of the book at all. I can't wait to find out how these two fare in their unique journeys and if there is any connection between the two.