Zahn's books, which have been largely embraced by the saga's fanbase, pick up five years after the events of Return of the Jedi and feature the same cast as the original trilogy.
However, E! Online claims to have heard from a Lucasfilm insider that the recently announced movie sequel will be an "original story" bearing no relation to the novels.
The Thrawn Trilogy began with the release of Heir to the Empire in 1991, which went on to become a New York Times best seller.
Star Wars: Episode 7 was announced yesterday (October 30) following the news that Disney is reviving the film franchise after buying Lucasfilm for $4.05 billion (£2.5bn) in cash and stock.
Star Wars: Episode 7, which is yet to appoint a director, is scheduled for release in 2015.
> 'Star Wars Episode 7' confirmed for 2015: Is it a good idea? - poll
Photo gallery - Star Wars rare behind-the-scenes images: