Mitosis

Mitosis is a novelette set within the Reckoners series, specifically taking place between the first two novels, Steelheart and Firefight. While it features familiar characters and themes, it offers a self-contained narrative that can be enjoyed without having read the full series.

Mitosis is part of the Reckoners series, which is distinct from Sanderson's Cosmere universe. It explores a different magic system and world, focusing on a post-apocalyptic Earth where certain individuals gain superpowers.

Yes — Mitosis is set directly after Steelheart and assumes complete familiarity with its events and characters.

It is a short novella of approximately 60 pages, originally published as an ebook exclusive and later included in some print editions of the Reckoners series.

Not strictly, but it adds context for what the Reckoners have been doing in Newcago between the two main novels.