The Stone Mouse is a children's fantasy novel by Jenny Nimmo, an author known for her atmospheric, highly imaginative stories. The title suggests a magical or enchanted object, perhaps a small mouse figure that comes to life. The plot would follow a child who discovers this object and is drawn into a world of magic, mystery, and potentially danger. The story would explore themes of transformation, the power of inanimate objects, and the quiet magic found in nature, all delivered with Nimmo's characteristic sensitivity and poetic prose.