Why on earth would he be doing a reading from the book he hasn't even finished yet? How does that make any sense? Nobody can be intrigued and go to his booth to buy it. This man knows nothing about marketing. If he's trying to sell books, he ought to be reading from one he's got available. This isn't even a scenario where he's teasing the next book in the series, so you can be intrigued by what you hear and then go back and read how it all starts out, and be caught up with the series by the time the new book comes out. Christmas Carnage isn't a sequel to anything he's got out - it's not even the same genre! People interested in hearing the rest of his story (rate me optimistic, I know) aren't going to see a bunch of spaceships and have that interest bleed over to his existing catalogue.
And the timeline for A Christmas Carnage's possible release is so vague and indeterminate that presenting it now is ludicrous. Everyone will have forgotten about it by the time it (theoretically) comes out. First, he's got to finish the book which, at the pace of - what's he up to? 20,000 words every four months? - not nearly fast enough, means he might have a book finished 16-32 months from now. It appears he's shopping it around to publishers now. Optimistically, he gets one, and it's still another year before it's ready to print. We're talking two and a half to four years before that book sees the light of day - if he even finishes it. And more realistically, if he finishes it, he's going to be faced with the prospect of self-publishing and I just don't believe he has the humility to go that route. He can't step down from the heady heights of being published through a traditional publishing house to doing it himself.