I'm proned to like this kind of literary experiments, and I did, although there were certainly parts that did not work that great. It's always difficult to write about a fictional genius, it you don't happen to be one yourself, and specially a genius at writing fiction. So, yeah, you can fall back on mentioning Pulitzers and then quote talk show appearances rather than what the genius wrote, but even that and the quotes didn't really sell what made him special.
Like LaShawn said., the political implications of millions of americans moving into Africa seems vastly underestimated, but it seemed that the author only really wanted the story to be about the americans and their reaction, and I guess he did not want to make that a factor.
But overall, I liked the exploration of the phases of collective shock and how his personal experiences mingled in the political issues. A somewhat flawed experiment of a story, but I'm glad to see these kind of things tried out in a sci-fi context.