Who finished the Wheel of Time series?

Context: Sanderson rose to prominence in late 2007 when Harriet McDougal, the wife and editor of author Robert Jordan, chose Sanderson to complete the final books in Jordan's epic fantasy series The Wheel of Time after Jordan's death. McDougal asked Sanderson to finish the series after being deeply impressed by his first Mistborn novel, The Final Empire. Tor Books made the announcement on December 7, 2007. After reviewing what was necessary to complete the series, Sanderson and Tor announced on March 30, 2009, that a final three books would be published instead of just one.

The first of these, The Gathering Storm, was published on October 27, 2009, and reached the number-one spot on the New York Times bestseller list for hardcover fiction.Towers of Midnight, the second-to-last Wheel of Time book, was published just over a year after The Gathering Storm on November 2, 2010, debuting at number one on the bestseller list. In early 2013, the series was completed with the publication of A Memory of Light.

Answer: The death of Robert Jordan, the original author of the Wheel of Time series, prompted his wife and editor, Harriet McDougal, to find someone to complete her late husband's work. She chose Brandon Sanderson, who had recently released the popular first novel of the Mistborn series, The Final Empire. Sanderson agreed after reviewing Jordan's notes.