When Harry and the dinosaurs go to the museum they see Roman swords and spears, Egyptian mummies and lots of Harry's ancestors. The dinosaurs want Harry to help them to find their ancestors ...and that's how Harry gets lost! Will Mum and Nan know where to look for him?

Having spent much of his life teaching English and Drama, Ian Whybrow is now a bestselling author. Among his most popular characters are the hugely successful Harry and the Bucketful of Dinosaurs and the much-loved Little Wolf. He is the author of the bestselling The Tickle Book illustrated by Axel Scheffler. Ian lives in Cambridge.

Adrian Reynolds is a hugely talented illustrator who has worked on many picture books, including the wonderful Harry stories and four adventures featuring Pete and Polo. Adrian lives in Cambridge.