The Adventures of Huckleberry Finn

please help!

"Adventures of Huckleberry Finn" is a fictional story of a white boy who helps his friend Jim escape slavery. It is told from Huck's point of view, so the reader is not exposed to Jim's inner thoughts or feelings. Huck undergoes a character change when he rejects what society has taught him (that slavery is right) and decides to help Jim, no matter what the cost.
"The Narrative of the Life of Frederick Douglass" is a nonfiction account of Frederick Douglass' life as a slave and his subsequent escape from slavery. The reader is exposed to Mr. Douglass' thoughts and feelings because Douglass is the author.
Both books ultimately have the same argument, that slavery is an inhumane institution, but one does it through a fictional account that is often humorous and entertaining, and told from the point of view of a white person, whereas the other is a more serious account of a real person's story. It is up to the reader to decide which one drives the argument home better.