Nicolas Calva has Caesar's magic bulla, the Malice of Mars, and he has hidden the dangerous Jupiter Stone, but he still has to find a way to defeat The Mistress, a dragon who contains the soul of the vestalis Atroxia, and who hates Rome, and save his mother and friends, and maybe even the Empire itself--and he is troubled by his sneaking sympathy for Atroxia, who was unjustly condemned.

Fourteen-year-old Jack and the dragon warrior Draycos face a diabolical and ruthless intergalactic slavemaster when Jack attempts to penetrate secret computer files about the cold-blooded underworld while posing as a slave.

The story of Harriet Tubman's childhood as a slave.

Twelve-year-old Sarny's brutal life as a slave becomes even more dangerous when a newly arrived slave offers to teach her how to read.

"Kamet, a secretary and slave to his Mede master, has the ambition and the means to become one of the most powerful people in the Empire. But with a whispered warning the future he envisioned is wrenched away, and he is forced onto a very different path"--

After a fellow slave is beaten to death, Sadie and her family flee the plantation for freedom through the Underground Railroad.

After fleeing the plantation where they were enslaved, siblings Ada and Homer discover the secret community of Freewater, and work with freeborn Sanzi to protect their new home from the encroaching dangers of the outside world.

In 1859, eleven-year-old Elijah Freeman, the first free-born child in Buxton, Canada, which is a haven for slaves fleeing the American south, uses his wits and skills to try to bring to justice the lying preacher who has stolen money that was to be used to buy a family's freedom.

In Massachusetts in 1771, seven-year-old Olivia learns about freedom from her father's slave, Mingo, who was promised that he'd be freed when the tide was low enough that he could walk to a certain spot offshore.

In 1787, a fourteen-year-old slave, anxious to buy freedom for himself and his mother, escapes from his dishonest master and tries to find help in cashing the soldiers' notes received by his father for fighting in the Revolution.