'A true genius . . . Roald Dahl is my hero' - David Walliams. Roald Dahl is the world's NUMBER ONE storyteller- the perfect author for every young reader's library! George Kranky's Grandma is a miserable grouch. George really hates that horrid old witchy woman. One Saturday morning, George is in charge of giving Grandma her medicine. So-ho! Ah-ha! Ho-hum! George knows exactly what to do. A magic medicine it will be. One that will either cure her completely... or blow off the top of her head.