Something terrible has happened in Louisa's sock drawer! One of the blue socks is all on its own. The old socks say that socks are only useful if they are in pairs. What will the blue sock do now? Join the adventure as the socks try to find the missing blue sock and discover, to their surprise, that one is every bit as important as two. Interactive learning and fun activities at your fingertips! Young readers can now access FREE bonus material including story-telling sessions, crafts lessons, video tutorials and more via the Ring Ring Story app! All they have to do is scan the QR code on the book cover!