The companion examines in detail the universe created by Jordan, which is set in an unnamed world.

It aims to be a glossary of his entire series and includes biographies of both major and minor characters, alongside their motivations.

Jordan, who assisted as editor, called that book broadly canonical but stated that it was written from the perspective of a historian within The Wheel of Time universe and was therefore prone to errors of bias and guesswork.

[4] The 350,000-word and 816-page long original text (ISBN 978-0765314611) was released by Tor Books in hardback format on 3 November 2015.

The Companion delves into characters, locations, items, languages, history, and events with commendable dedication, with particular praise aimed at a multi-page written and visual breakdown of the logistics of the Last Battle from A Memory of Light.