Did Jack London write adventure novels serious plays or humorous verse?

Jack London was primarily known for his adventure novels. He also wrote serious plays, but they were not as successful as his novels. He did not write humorous verse.

Here's a breakdown:

* Adventure Novels: This is what London is most famous for. His novels often featured themes of survival, nature, and the struggle against adversity. Some of his most famous adventure novels include *Call of the Wild*, *White Fang*, and *The Sea Wolf*.

* Serious Plays: London wrote several plays, but they were generally less well-received than his novels. His plays often dealt with social and political issues, such as labor unrest and the struggle for justice.

* Humorous Verse: London did not write humorous verse. His writing style was generally serious and often focused on gritty realism.

While London's plays and other works are worth exploring, his legacy rests largely on his adventure novels, which continue to be enjoyed by readers worldwide.