"Gangsta Granny" is a children's novel written by David Walliams. The story revolves around the life of an 11-year-old boy named Ben, who is bored with his parents' obsession with ballroom dancing and his school's strict rules. He dislikes spending Friday nights with his boring, cabbage-soup-loving granny.
One day, Ben discovers that his granny is not as dull as he thought. He finds out that she was once an international jewel thief known as the "Black Cat," who has stolen the crown jewels. Ben and his granny come up with a plan to steal the Queen's crown from the Tower of London.
Ben learns the tricks of the trade from his granny, and together they plan their heist. They sneak into the Tower of London and successfully steal the crown. However, they are caught by the police and are taken to jail. Ben's parents and the Queen come to the jail to visit them. It is then that Ben discovers that his parents are also secret ballroom dancers, and the Queen forgives Ben and his granny for their crime.
In the end, Ben's relationship with his granny becomes stronger, and he realizes that there is more to her than meets the eye. The book explores themes such as the importance of family, the value of relationships, and the dangers of making assumptions about others based on their appearance.
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