A BLADE SO BLACK (The Nightmare-Verse Series #1) by L. L. McKinney
The first time the Nightmares came, it nearly cost Alice her life. Now she's trained to battle monstrous creatures in the dark dream realm known as Wonderland with magic weapons and hardcore fighting skills. Yet even warriors have a curfew. Life in real-world Atlanta isn't always so simple, as Alice juggles an overprotective mom, a high-maintenance best friend, and a slipping GPA. Keeping the Nightmares at bay is turning into a full-time job. But when Alice's handsome and mysterious mentor is poisoned, she has to find the antidote by venturing deeper into Wonderland than she’s ever gone before. And she'll need to use everything she's learned in both worlds to keep from losing her head... literally.