Well, as of now, the new Black Panther in the comics is often identified as Shuri. This change came about due to the storyline and character developments within the comic universe.
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.
As the Black Panther, Peter would have the power of the vibranium suit. This would not only provide him with near - indestructible protection but also the ability to absorb and redistribute kinetic energy. He could use this to his advantage in combat, either by taking a hit and then using the stored energy to deliver a powerful counter - attack or to enhance his jumps and movements.
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.