This is the sequel to Ten Week Stables. Everything is going well for Sarah and Ginette - they, their pupils and ponies are going to take part in a local pageant, but then film star Beulah turns up. She hates animals, is sure she is going to marry the girls’ landlord, and is determined to chuck them out of the stables.
Two sixteen year old girls start a riding stables for the summer to show parents they can be a success working with horses, and don't have to go to domestic college or become secretaries. They have some misadventures, of course, but they don't get unfairly blamed for anything or told that they're too young and irresponsible.
Thanks to Gillian Taylor for this summary, and to Hannah Fleetwood for the picture.