A heartwarming World Book Day story from Rose Ayling-Ellis about empathy, friendship and deaf awareness. Uh oh! Where did Casper go?When a noisy storm scares Halo and Rocky, Casper remains calm. But when lightning flashes, Casper dashes off, and the other kittens realise he is deaf! Can Halo and Rocky be brave, find Casper, and learn a new way to communicate with their friend?The Big Bang! is a charming and accessible story for children aged 3-5 that teaches the importance of helping others - especially those with disabilities - fostering emotional intelligence early in life. Inside this inclusive picture book, you'll find:A story of empathy and understanding by award-winning actress, author, and presenter, and Rose Ayling-Ellis MBE. An official World Book Day 2026 book that explores deafness in an age-appropriate way, created to promote reading, awareness and inclusivity. An introduction to British Sign Language (BSL) with a page of useful illustrated signs to learn. Adorable illustrations by bestselling, award-winning author-illustrator, Paddy Donnelly. Perfect for World Book Day, this inspiring story opens up conversations about difference, communication and kindness.