This is from a few pages back, but not one answered.
Superheated slugs of tibana gas.
First off, it was really a twilight series, there were like 2 books with twilight in the title, Jedi Twilight and Planet of Twilight. I assume you're talking about Jedi Twilight because it was the first book in the Coruscant Nights series. I won't fill you in on it, but it was a pretty good series. Followed a jedi who escaped the purge at the end of episode 3.
Second, thanks to you my wife now thinks star wars books are romance novels.
That looks kinda like Revan's mask.
Oh and, I'll join in on the chimpout because the light crossguards look stupid as hell.