Out of the three novelettes that have been released in this series so far, The Defiler's Throne is easily my favorite.
What I enjoyed most about The Defiler's Throne is that I never knew what to expect. No one is who you think they are; Raven's mother, Xavier, Triniti... they are all harboring their own secrets.
The Defiler's Throne picks up shortly after where Signs and Portents leaves off in Raven's mother's apartment. Raven confronts her mother after learning that she isn't being held against her will, but the woman Raven knew as her mother is long gone. It is obviously an emotional scene, and it helps to set up the rest of the story.
I'm not quite sure how to review this installment without giving anything away - seriously, I want to discuss Raven and Ian, and Raven and Xavier, but I can't without spoiling the story - so I'll just say this: if you haven't started this series yet, you're missing out.