Arcanum Unbounded: The Cosmere Collection

Arcanum Unbound is a collection of short stories in Brandon Sanderson's Cosmere universe. It is presented as a double abstraction, with an in-universe historian providing the background of the planet and the situation, as well as the author providing commentary on the story. Being fantasy, some of the stories are novella length on their own. There are some that focus on characters familiar to readers of other books he has written, while other stories are minor or new characters that have not had any significant appearances. Some served to add background to characters and events in his other novels. Others, were more random ditties. It felt like a fun dumping ground for interesting thoughts and stories that did not fit into the primary novel sequence.

The different titles (from Sanderson's website
“The Hope of Elantris” (Elantris)
“The Eleventh Metal” (Mistborn)
“The Emperor’s Soul” (Elantris)
“Allomancer Jak and the Pits of Eltania, Episodes 28 through 30” (Mistborn)
“White Sand” (excerpt; Taldain)
“Shadows for Silence in the Forests of Hell” (Threnody)
“Sixth of Dusk” (First of the Sun)
“Mistborn: Secret History” (Mistborn)