That's one of the "themes" of the original Mistborn trilogy, and I think it's appropriate here. Seriously though, read the entire original Mistborn trilogy (Mistborn, Well of Ascension, Hero of Ages) and the first 3 Wax & Wayne books (Alloy of Law, Shadows of Self, Bands of Mourning) BEFORE you read this. But as soon as you've read those 6, DEFINITELY READ THIS. It will change your life.
First, realize this isn't a traditional novella - it's longer than Brandon's standalone novellas, but shorter than the Wax & Wayne books. It also doesn't really have an independent plot arc - it's kind of a companion novella that fills in some gaps and answers some questions from the original Mistborn trilogy. It also features some Cosmere tie-ins, so if you're familiar with Brandon's Cosmere, you'll pick up a few more tidbits. It's fantastic.
There isn't a whole lot else than can be said about it without giving something away. Bottom line, if you're a fan of the Mistborn books, you will love this, just do yourself a huge favor and make sure to read it in the right order!