In this captivating quest that spans the globe, a young girl must challenge her assumptions about family, slavery, and friendship as she fights to save her father's legacy ... and to begin creating her own.Hallelujah Wonder wants to become one of the first female scientists of the nineteenth century. Her father was a scientist and explorer, but his life was cruelly cut short by an evil Navy captain who coveted his cache of artifacts. Hallelujah feels a great responsibility to protect the objects--particularly a mesmerizing (and dangerous) one called the Medicine Head--before the captain can succeed. Now she and her best friend, a slave boy about to be sold, must set out on a sweeping adventure by land and by sea to the only place where no one will ever be able to find the cursed talisman: the forbidding land of Antarctica.