Son of the Whirlwind.

From back cover: Wirramirra is still a foal when he sets off, with his mother Yuri, to seek his father, the legendary Silver Brumby, Thowra. The journey is fraught with danger. Wirramirra's life is continually threatened, if not from jealous attacks by other foals who see him as a future leader, by man - always seeking to capture this free-spirited wild horse. Battling through fire, lightning and blizzards, the road to Thowra stretches on forever and Wirramirra begins to wonder if he will ever reach the end.