Book excerpt: Boundless Horizons tells the extraordinary story of Marie Clay's lifelong search for new possibilities in teaching young children to read and write. She pursued a tantalising quest: "What is possible for children with reading problems? What would have to change?' Observing young readers in ordinary classrooms she uncovered explanations of how children take on literacy learning and how that learning changes over time. From those discoveries arose the internationally successful literacy intervention for children having temporary difficulty-Reading Recovery.