Summer Term by Susan Pleydell
A novel of life, love and intrigue for power at a boys' public school, told with charm, wit and skill. When Clare Fielding, the headmaster's daughter, took her mother's place at Ledenham School for a term, she was looking forward to running the School and the House. But the arrival of her sophisticated and stunningly beautiful cousin Frances and the subtle persecution of the raw new maths master, Angus, made the summer term at once more exciting and more difficult than she had expected. Thoroughly decent chaps and all-round integrity are the order of the day in this, the author's first novel, originally written in 1959.