A hilarious and moving story of old age, adventure, stolen jewels and swimming the Thames, from from David Walliams, number one bestseller and fastest growing children's author in the country. "I absolutely love David Walliams's books. In a few more years they will become classics." - Sue Townsend, author of Adrian Mole Our hero Ben is bored beyond belief after he is made to stay at his grandma's house. She's the boringest grandma ever: all she wants to do is to play Scrabble, and eat cabbage soup. But there are two things Ben doesn't know about his grandma. 1) She was once an international jewel thief. 2) All her life, she has been plotting to steal the Crown Jewels, and now she needs Ben's help...

Author Biography

David Walliams - comedian, actor and author - continues to take the children's literary world by storm. His tenth novel, BAD DAD, was an immediate number one, following the triumph of THE MIDNIGHT GANG, the biggest-selling children's book of 2016. WORLD'S WORST CHILDREN 2, which published in early 2017, spent four weeks at industry number one and eight weeks at the top of the children's chart. They have achieved unprecedented critical acclaim - and RATBURGER, DEMON DENTIST and AWFUL AUNTIE have all won the National Book Awards Children's Book of the Year. David's books have now exceeded 100 non-consecutive weeks in the children's number-one spot, and have been translated into 53 languages, selling more than 32 million copies worldwide.