Unicorn School is a series of chapter books written by Linda Chapman and published by Puffin between 2007 and 2009. The series is about a Unicorn boarding school in a fictional land called Arcadia. The Unicorns in Arcadia go to school at nine years of age. When they leave school at 15 years of age, the best ones become the Guardians of Arcadia. The series revolves around a Unicorn named Willow. All of the books currently written in the series take place in her first year. Source: Wikipedia (en)