Cave City, Kentucky, 1925. Young Arly Dunbar loves exploring caves with his grown-up friend Floyd Collins. When Floyd, exploring by himself, becomes trapped in Sand Cave, the entire town comes to the rescue. Can Arly find a way to help his friend?

Recounts in graphic novel format how Allen Jay, a young Quaker boy living in Ohio during the 1840s, helped a fleeing slave escape his master and make it to freedom through the Underground Railroad.

On January 12, 1888, when a blizzard blows off the roof of their schoolhouse on what had been an unseasonably warm day in Nebraska, Sarah and Annie are roped together with the other children and led by their teacher out into the storm and, hopefully, to the safety of her house. Simultaneous.

Under the nose of the enemy army . . . a boy carries a dangerous secret. Philadelphia, Pennsylvania, 1777. John Darragh’s family has sided with the rebel colonists during the Revolutionary War. But the family lives across the street from the headquarters of the British army, their enemies. The Darragh family spies on the British, and John takes messages to his brother in the rebel camp. Can John sneak past the British soldiers this time?

In 1777, on a cold and stormy night in the New York Colony, 16-year-old Sybil Ludington makes a dangerous and difficult ride to warn the local militiamen that the British Army is looting and burning nearby Danbury, Connecticut. Simultaneous.

During the biggest game of her life . . . a girl pitches to the world’s best slugger. Chattanooga, Tennessee, 1931. Jackie Mitchell is a girl pitcher on a minor-league baseball team, the Chattanooga Lookouts. In her day, few women played sports. But her skill earned her a spot on a men’s team. When the New York Yankees come to town, Jackie must face Babe Ruth at the plate. Can she strike out one of the greatest players in baseball?

Discusses cave geology and spelunking, the sport of cave exploration.