"Postman Pat's Thirsty Day" is a 32-page hardback storybook by John Cunliffe, published by Scholastic in 1984. The book, part of the Postman Pat series, follows the adventures of a lovable postman named Pat as he encounters various challenges on a hot, thirsty day. The story is written in English and features charming illustrations by the author himself, making it a delightful read for young children.