Grandpa's Great Escape is a children's book written by David Walliams and illustrated by Tony Ross. It was released by HarperCollins on 24 September 2015. The story follows a boy called Jack trying to rescue his confused Grandpa from a retirement home, Twilight Towers run by an evil matron, Miss Swine.The book was adapted for BBC One, with the script written by Walliams and Kevin Cecil. It starred Tom Courtenay as Grandpa. Its British television premiere was on New Year's Day 2018. Source: Wikipedia (en)