The Enchanted Princess. Broken Curses, #1

As the royal heir of Zelnon, Princess Elodie should be living a charmed life. It is enchanting in a diabolical way that could destroy not only her existence but those she cares about as well. Her coronation is set for her eighteenth birthday, but an evil force is determined to destroy any chance she has of becoming queen. A week before her birthday a curse is enacted sending her to the nightmare realm of Malediction-sweeping her, a trusted guard, and the prince of a neighboring kingdom into its dark clutches.
Escaping the world is impossible, but if they don't find a way out they will either die or become permanent residents of the dreamscape. If Elodie doesn't return home in time her kingdom could be lost to her forever. As they battle for their lives, every decision exacts a monumental price. They must make sacrifices that will burn a hole into their souls and every step brings new risks. With victory within reach, they realize that it comes with an irremediable loss and must suffer the consequences of their actions.