Dick Sand: A Captain at Fifteen

Dick Sand, A Captain at Fifteen (French: Un capitaine de quinze ans) is a Jules Verne novel published in 1878. It deals primarily with the issue of slavery, and the African slave trade by other Africans in particular.

Several adaptations were made, two Soviet and one Franco-Spanish.

Themes explored in the novel include:

The painful learning of adult life - the hero, Dick Sand, must assume command of a ship after the death of his captain.

The discovery of entomology

Condemnation of slavery

Revenge (wikipedia.org)