Upon conclusion Callsign: King- Blackout puts me in a weird position. While I won't say that the final volume in Robinson's Chesspocolypse series was horrible (because it did have its moments of fun), I have to say that after 14 months of getting through them, I am a little bit glad to be done with these 8 short novels.
In all honesty, while this book and the majority of the others are thrillers of the highest order, after about the 4th book, it was just a lot of the same thing, over and over again. Of course, there isn't anything wrong with that, and, after all, Robinson is known as one of the best in this sub-genre as well as the creator of the Chess Team, so there is going to be a rather common theme of familiarity throughout these stories, it's just that after 8 books of basically the same plot recycled with a different facade, the creativity and originality start to wane and the non stop action can't really do much to save it.
That's not to say that Blackout isn't good. Despite its repetition, I would have to say it ranks among the best of the entire series, maybe only beat by Callsign: Bishop and the first Callsign: King. Ellis and Robinson make a great team as authors (although it's pretty evident most, if not all, of the writing here was Ellis's). In typical Chess Team fashion, this final book is fast and has enough action to keep even the most apathetic readers at least marginally entertained.