The Sierra Letter Author:Tom Moore Andrew discovers a mysterious letter a few days after his birthday. After receiving an invitation to a top secret academy where only the brightest minds are accepted, Andrew learns that everything isn't what it seems. Him and his new friends have one chance to escape the academy when they uncover the darker truth of the facility. It will test th... more »e limit of their bravery and wit as they attempt to break free unscathed.« less