Go back in time with No. 1 bestselling author David Walliams for a whizz-bang epic adventure of action, laughter and secret plots – and the extraordinary friendship between a little boy and a huge gorilla that just might save the day…

1940. Britain is at war with Nazi Germany.

Eleven-year-old Eric spends his days at the place that makes him most happy: London Zoo. And there’s one animal in particular he loves: Gertrude the gorilla.

With bombs falling all over London, Eric must rescue Gertrude.

Together with his Uncle Sid, a keeper at the zoo, the three go on the run. But while hiding out at the seaside they uncover a top-secret Nazi plot…

David Walliams has taken the children’s literary world by storm Since 2008. His most recent book RATBURGER,immediately went to no.1 in the children’s chart, while the PB of his previous title, GANGSTA GRANNY, currently dominates the UK charts and has sold over 100,000 PBs on top of 370,000+ HBs and 36,000 ebooks (Bookscan July 2013). Today, David is the fastest growing Children’s author in the UK. His books have been translated into 30+ languages and sold over 2 million copies in the UK alone.