The much beloved author collapsed at VisionCon in Springfield, Missouri, with suspected heart failure.
Allston's friend and fellow Star Wars author Timothy Zahn, posted a tribute on Facebook:
Aaron was a wonderful author, a devastating punster, an erudite teacher, and -- most of all -- a wonderful friend. His humor in the midst of his pain and medical difficulties was an inspiration to everyone around him, and I will always remember the panels he and I (often with Mike Stackpole) did together. The Aaron, Mike, and Tim show, as we called it, has come to a sad close.
Aaron Allston was a Texas-born veteran of Star Wars, most well known to fans for his contributions to the X-Wing and New Jedi Order series. He also wrote for the Legacy of the Force and Fate of the Jedi series. His last Star Wars novel was took him back to his roots with X-Wing: Mercy Kill.
His dedication to sci-fi and fantasy, and the unrivalled wit he poured into his writing will be sorely missed by fans.
Rest in peace Aaron Allston, 1960 - 2014.