Sapphique (Turtleback School & Library Binding Edition) - Catherine Fisher

The story continues for Finn, Claudia, Attia & Keiro, but some characters don't grow as the story does. I thought maybe we would get something more from Keiro or Attia, but we don't. It seems like we never dig deep enough for these characters.
The story moved along fast and in the direction I thought it would move in. But something at the end just left me unhappy and feeling like I got ripped off.