Kingdom of Water: A Graphic Novel (The Rema Chronicles #2)

Tabby's adventures in the rich and captivating world of Rema continue!

Even though Rema's portals will no longer work for Tabby, she hasn't
  given up on finding a way back to her world. Her father's last
  words urge her to search for a lost geist prince, but the escalating
  hunt for geists means that Philip and the others are in more
  danger than ever. When Philip is apprehended, Tabby must expose
  the lost history of Rema and those that want to distort it. But
  the secrets of the geists, Tabby's father, and the ghost that haunts
  them threaten to overturn everything Tabby knows -- and change
  her relationship with Philip forever.