Dream by the ShadowsDream by the Shadows

In a kingdom plagued with a deadly curse spread by dreaming, eighteen-year-old Esmer has the ability to enter the dream realm where she falls in love with the wicked Shadow Bringer.
The Kingdom of Noctis is plagued by Corruption: a curse that spreads through dreaming. The Shadow Bringer rules from his castle in the Dream Realm, stealing souls one dreamer at a time. Only an elixir, taken every night before sleeping, can ward off the dreams and halt Corruption. But for some, the allure of the Dream Realm proves too strong. Esmer Havenfall desperately wants to escape her dreadful village. When her sister, Eden, succumbs to Corruption and their elixir-dealing parents are accused of a horrific crime, Esmer's life unravels into a nightmare. Then she dreams of the Shadow Bringer and learns that his sinister magic might be a part of her, too. Enticed by the prospect of ending her kingdom's curse and avenging her family, Esmer follows him deeper within the Dream Realm. But the prince of darkness has a haunted past, one that might change the fate of Esmer's kingdom-and her heart-forever.