Helen Cresswell (1934–2005) was an English television scriptwriter and author of more than 100 children's books, best known for comedy and supernatural fiction. Her most popular book series, Lizzie Dripping and The Bagthorpe Saga, were also the basis for television series.
A little girl and her mother arrive for a stay of a few weeks at her aunt's dreary hotel in Llangolly. It is off season and the pier is deserted -- so why does Carrie keep seeing a boy and dog?