In the end, there was no way Gribb could have resisted The Callisto Protocol - the cover has a haggard man in a craggy and unforgiving environment. Generally, that would be sufficient. But then, just to set the hook, he has an alien world figuratively - and literally, I guess - resting on his shoulders. He has no natural defense against this. This will pry him apart and devour the most tender part of him, which is frankly on-brand for this kind of Protocol.
