The story is set in the 1930s and concerns a certain Miss Guinevere Pettigrew who is a governess desperate for a position. She is sent along to a Miss LaFosse but quickly realises there has been a mistake. She tries to explain but Miss LaFosse - an actress - embroils her in the complications of her love life and she is able to help solve a sticky situation. Miss Pettigrew thus feels useful for the first time in her rather sad life. Miss LaFosse's friends accept her into their circle and thus begins the best day of Miss Pettigrew's entire life.
I gather this is one of Persephone's most popular books and it's hardly surprising. It's utterly charming and heartwarming in that old fashioned English sort of way. I devoured it in a couple of days and adored the illustrations that pepper the text. Delightful.