Aunts Aren't Gentlemen by P. G. Wodehouse

On doctor's orders, Bertie Wooster retires to sample the bucolic delights of Maiden Eggesford. But his idyll is rudely shattered by Aunt Dahlia who wants him to nobble a racehorse. Similar blots on Bertie's horizon come in the shape of Major Plank, the African explorer, Vanessa Cook, proud beauty and "molder of men," and Orlo Porter who seems to have nothing else to do but think of sundering Bertie's head from his body.