Grandude's Green Submarine

As the Chillers explored, Lucy spotted a picture of Nandude, their adventurous grandmother. "When will we see her again ? " asked Bob. "Perhaps we could go on an adventure to find her ! " said Em. Jump aboard Grandude's magical green submarine and join the quest to find Nandude, following her musical trail around the world and deep, deep beneath the sea. This is an action-packed, rip-roaring adventure - full of funny surprises and heart-warming family fun.
Paul McCartney and Kathryn Durst's first Grandude adventure was a New York Times number-one bestseller and a global sensation, translated into over thirty languages.