Number one bestselling author David Walliams presents this explosively funny space adventure, illustrated by artistic genius Tony Ross. This eBook comes with read-along audio, hilariously performed by the author himself. Warning: very silly sound-effects included! Two big hippos. One ENORMOUS dream. Who can make it to the moon first? 3 . . . 2 . . . 1 . . . BLAST OFF! Introducing a wonderfully charming and funny new picture book from two superstars!