Insomnia: The Dream World Chronicles, Book 3 (Unabridged‪)‬

After the events of Nightmare, Eden and Darius are finally together, even if their relationship must remain a secret, one becoming more and more difficult to keep as the darkness taking over the Dream Realm gradually increases, stealing the light and trapping mortals in their dreams.

Soon, a different type of magic begins to threaten their Paired Union, one that is not only robbing them of their powers, but which could separate them forever if they don't find a way to stop it.