Deep Geeking: Legions of Fire, The Centauri Prime trilogy written by Peter David, is the topic for this episode, and the crew on hand really digs in.

The books in order are "The Long Night of Centauri Prime", "Armies of Light and Dark", and "Out of the Darkness" (the third book is out of print, but not quite as hard to find as it had been in previous years). This was the second of the Babylon 5 trilogies that are considered canon.