From amazon.com:

In 2005, Brandon Sanderson debuted with Elantris, an epic fantasy unlike any other then on the market. To celebrate its tenth anniversary, Tor is reissuing Elantris in a special edition, a fresh chance to introduce it to the myriad readers who have since become Sanderson fans.

This new edition begins with a preface by author Dan Wells, the first person to read the completed novel, and a new afterword by Sanderson explaining how he came to write the book and its place in the Cosmere, the unified universe of all his Tor novels.

Also included is an expanded version of the "Ars Arcanum" appendix, with more of the technical details of the book's magic that fans can never get enough of.

Elantris was truly a milestone both for Sanderson and for the genre of epic fantasy. It deserves this special treatment, something Tor has done only once before, with Orson Scott Card's Ender's Game. Sanderson fans old and new will be excited to discover it.

From amazon.com:

WINNER, 2013 Hugo Award for Best Novella!
Nominee, 2013 World Fantasy Award for Novella!

From #1 New York Times bestselling author Brandon Sanderson, The Emperor's Soul showcases a fascinating magic system as the clock ticks down for a condemned criminal.

When Shai is caught replacing the Moon Scepter with her nearly flawless forgery, she must bargain for her life. An assassin has left the Emperor Ashravan without consciousness, a circumstance concealed only by the death of his wife. If the emperor does not emerge after his hundred-day mourning period, the rule of the Heritage Faction will be forfeit and the empire will fall into chaos.

Shai is given an impossible task: to create—to Forge—a new soul for the emperor in less than one hundred days. But her soul-Forgery is considered an abomination by her captors. She is confined to a tiny, dirty chamber, guarded by a man who hates her, spied upon by politicians, and trapped behind a door sealed in her own blood. Shai's only possible ally is the emperor's most loyal councillor, Gaotona, who struggles to understand her true talent.

Time is running out for Shai. Forging, while deducing the motivations of her captors, she needs a perfect plan to escape…