Someone on the StarWarsEU reddit put together a couple of interviews from Tom Veitch talking about Lightsider. Plus some comments from Bob Cooper, editor at Dark Horse at the time. All from 1995/96:
https://www.reddit.com/r/StarWarsEU/comments/yk1y70/the_lightsider_interviews
and some fans’ thoughts on Lightsider:
https://www.reddit.com/r/StarWarsEU/comments/yizuo1/my_thoughts_on_the_novella_lightsider_by_tom