I don't think this needs a summary; it's the story of Gawain and the Green Knight. Its a quick read with some nice illustrations and an excellent, humorous voice. The story is a lesson-teaching kind of story, and that comes across very clearly, but it's not didactic, either. No one comes right out and says, "Keep your promises, but don't make a lot of them, and also, be nice to people." The audience is going to work that out for themselves, and there are also smaller, less obvious lessons about things like the importance of reputation. And did I say? It's totally funny. This book would be great for classroom use, but I think a lot of kids would be thrilled to read it just for fun.