Well, the themes include the inhumane nature of slavery. The graphic novel shows how brutally slaves were treated. Then there's the theme of self - discovery. Frederick Douglass discovers his own strength and worth, which gives him the motivation to fight for his freedom. And of course, the theme of hope, that even in the darkest times, there is hope for a better future.
One key theme is freedom. Douglass' struggle for freedom from slavery is central. Another is education as it was his learning that empowered him. Also, the theme of resistance against oppression runs throughout as he fought against the unjust system of slavery.