At ninja competitions, modern ninja leap, climb, and crawl through twisted obstacle courses. But how did historical ninja use their strength and stealthy skills? Find out the mysterious and exciting truths behind ninja then and now! Learn all about how ninja train, fight, and compete in the Ninja Mania series-part of the Lightning Bolt Books® collection. With high-energy designs, exciting photos, and lively text, Lightning Bolt Books® bring nonfiction topics to life! Book jacket.