Complex sentence: Eve Garnett wrote it as a period piece, probably set in 1938, detailing the summer holiday which Kate Ruggles spends at the Dew Drop Inn in the fictional village of Upper Cassington, which is probably meant to be in Sussex.
Split into simpler sentences: Eve Garnett wrote it as a period piece, probably set in 1938. It describes Kate Ruggles' summer holiday at the Dew Drop Inn in the fictional village of Upper Cassington, which is probably meant to be in Sussex.