Wow. Okay. Really having trouble with my words on this one, because my heart is so full of feels after this incredible gift of a novella. I agree with all other reviewers who are saying DO NOT READ THIS UNTIL YOU'RE CAUGHT UP ON THE MISTBORN BOOKS. ALL OF THEM. It's worth the wait! 
 The Mistborn books were already one of (if not my all-time) favorite series, but this (view spoiler)[behind-the-scenes look at what was going on during the original trilogy (hide spoiler)] novella just ratcheted it up to a whole new level. I'm in awe of Sanderson's world-building, but even more so, with his planning. No "oh yeah, we totally planned on Luke and Leia being siblings all along, sure we did" retconning here. Much like (view spoiler)[Kelsier during the events of this book (hide spoiler)], we the readers are realizing that there are layers upon layers in the Cosmere books, there are worlds of information waiting for us, and every book brings us closer to the truth. I, for one, am overjoyed to be on this journey!