The Black Panther comic has its own unique fictional universe and narrative that is not related to the Black Panther Group. The comic's creation was based on comic book concepts and storytelling rather than any direct connection to the group.
One great 'Black Panther' fanfiction is 'The New Wakanda' which explores a Wakanda that has to face a new, unseen threat. It has great character development for T'Challa and his sister Shuri.
The Legend of Black Panther is an audio novel that can be listened to for free. However, the search results did not provide clear information on which platform could be listened to for free. Therefore, I don't know the specific platform for free listening to books.
It's very important as it gives the backstory. It shows how the Black Panther character and the Wakandan nation came to be. It sets the foundation for the character's values, powers, and the unique culture of Wakanda.
In the 2018 'Black Panther' story, T'Challa is the central figure. Wakanda is a place full of advanced technology that has been hidden from the world. T'Challa has to deal with the return of Erik Killmonger, who has a claim to the throne. The story is about power, identity, and the responsibility that comes with ruling a nation as important as Wakanda. It's a visually stunning movie that shows the beauty and strength of African culture.