Digger is a serious fantasy tale that manages to be both meaningful and light-hearted. It explores complex themes of honor, responsability, and the gray areas between right and wrong, but it does so with a frequent application of humor, wit and absurdity that keeps the story lively. It is an adventure story that can be fully enjoyed by young adult readers, but it also has levels of complexity in its humor and themes that became deeper and more meaningful with age experience.