Wonderland by David-Matthew Barnes

After her mother loses her battle to cancer, fifteen-year-old Destiny Moore moves from Chicago to Avalon Cove, a mysterious island in South Carolina. There, she starts a new life working part-time as a magician's assistant and living with her eccentric uncle Fred and his hottie husband, Clark. Destiny is soon befriended by two outcasts, Tasha Gordon and Topher McGentry. She accepts their invitation to accompany them to a place called Wonderland, a former boarding house owned by the enigmatic Adrianna Marveaux. It's there that Destiny meets and falls in love with Dominic, Tasha becomes enamored with Juliet, and Topher gives his heart to Pablo. When Destiny uncovers the reason she and her friends have really been brought to Wonderland, she's faced with the most crucial choice of her life.