The oldest known curling stone is more than 500 years old. Curling first became an official Olympic event in 1998. Learn more in Curling, a For the Love of Sports book. Each title in the For the Love of Sports series features easy-to-read text, stunning visuals, and a challenging educational activity. A unique book code printed on page 2 unlocks multimedia content. These books come alive with video, audio, weblinks, slideshows, activities, hands-on experiments, and much more.