Laurie Halse Anderson

After being sold to a cruel couple in New York City, a slave named Isabel spies for the rebels during the Revolutionary War.

"As the Revolutionary War rages on, Isabel and Curzon are reported as runaways, and the awful Bellingham is determined to track them down. With purpose and faith, Isabel and Curzon march on, fiercely determined to find Isabel's little sister Ruth, who is enslaved in a Southern state"--

Separated from his friend Isabel after their daring escape from slavery, fifteen-year-old Curzon serves as a free man in the Continental Army at Valley Forge until he and Isabel are thrown together again, as slaves once more.