The Silver Eclipse

Something's wrong in the city of Akkron. When Wren discovers her teacher is a member of a secret group called The Dark Cloud, she has no choice but to open an illegal portal to earth. When she returns home, she finds she has brought back a boy named Graham, and she doesn't have the power to take him home.
Graham's goal in life is to get a basketball scholarship and become a doctor so he can help people and be free of his controlling aunt. His plans are derailed when he finds himself transported to a strange and magical world. With the help of new friends, Graham must confront the problem the adults are afraid to act on. As Graham becomes involved in an ancient prophecy, he comes to suspect he might not be a stranger to Akkron after all.