Riding a horse is not a gentle hobby, to be picked up and laid down like a game of solitaire. It is a grand passion. It seizes a person whole and once it has done so, he/she will have to accept that his life will be radically changed.
But, if we explore the literature of Heroism, we shall quickly come to Plutarch, who is its Doctor and historian. To him we owe the Brasidas, the Dion, the Epaminodas, the Scipio of old, and I must think we are more deeply indebted to him than to all the ancient writers. Each of his "Lives" is a refutation to the despondency and cowardice of our religious and political theorists. A wild courage, a Stoicism not of the schools, but of the blood, shines in every anecdote, and had given that book immense fame.
Be a little careful about your library. Do you foresee what you will do with it? Very little to be sure. But the real question is what it will do with you? You will come here and get books that will open your eyes, and your ears, and your curiosity, and turn you inside out or outside in.