In case you missed it, I posted a review of the first book in Brandon Sanderson’s Reckoners Series, Steelheart, last Saturday. I picked up Book 2, Firefight, and began reading but kept coming across this mention of a battle with Mitosis, which sounded familiar, so I checked, and sure enough, Mitosis is a standalone story that falls between Steelheart and Firefight.
Mitosis was fairly short and I finished reading it in under an hour. It was a good piece of action between the two main novels. I wouldn’t say it’s a must read. I think one could just go from Steelheart to Firefight and not feel like they’re missing much, but it did add a nice bit of backstory during the passage of time between Steelheart and Firefight, which is a few months.
If you’re a Sanderson fan, or just need to read every piece of lore in a universe, then you probably won’t want to skip Mitosis.