Demon Slayer: Kimetsu no Yaiba [鬼滅の刃] is a 23-book series with 23 released primary works first released in 2016 with contributions by Koyoharu Gotouge and 吾峠呼世晴.
In Taisho-era Japan, kindhearted Tanjiro Kamado makes a living selling charcoal. But his peaceful life is shattered when a demon slaughters his entire family. His little sister Nezuko is the only survivor, but she has been transformed into a demon herself! Tanjiro sets out on a dangerous journey to find a way to return his sister to normal and destroy the demon who ruined his life.