This is a great book if you have fond memories of C. S. Lewis's Chronicles of Narnia. The Door Within is the first book of a young adult trilogy.
Batson casts young Aiden as the hero of the story. In this book, he has to move across the country when his grandfather becomes ill. In his grandfather's basement, he finds 3 ancient scrolls. They contain the history of a faraway land called the Realm. Aiden gets to cross over to the new land. Once he is there, the real adventure begins. You will enjoy meeting Captain Valithor, Gwenne, and the other knights. Aiden and the other knights go into battle against the forces of Paragory.
An excellent book for any fan of Narnia. Batson will keep you on the edge of your seat until the last page.