Barnes and Noble often stocks manga, but it's best to check their website or call your local store to see exactly what's in stock. They might have a dedicated section for manga with a decent range of genres and titles.
Barnes and Noble does carry comics. They usually have popular titles and some indie ones. But it's best to check your local store or their website to see the exact inventory they have at any given time.
It depends on various factors. Barnes and Noble offers a wide range of fiction, and their success often lies in attracting readers with diverse and engaging stories.