The Book of Dreams (Dark Library Series #2) by Morgan Reilly:
 
Grief. Rory had grown used to her mother's absence, visiting her primarily in dreams while she led a human kingdom to fulfill a magical deal. With Rory's blend of herbs, she created a tea that gives the drinker deep, lucid dreams where they can build a world of their heart's desire. But when her mother dies, Rory struggles with the grief that follows, a grief that mingles with bitterness that cuts into the soft places of her heart. Betrayal. A villager is found dead, and blame falls on Rory's dream tea. But Rory's road to proving her innocence becomes complicated when the villager's betrothed wants revenge, aided in secret by someone Rory trusts... Anger.
 
Angered and betrayed, Rory races against time to meet with those in power who can prove her innocence and stop the madmen on her heels, navigating the growing shadows within her to keep from losing what matters most-new friends, a new love, a chance at a new life...
 
But she's cursed, her mind haunted. She can't sleep, she can't dream, and her nightmares are becoming real. Drift into book two of the Dark Library Series, complete with a slow burn romance and found family. But beware the moment you close your eyes...