Oh good lord. Ok, I want to know how long Johnny Nexus as been planting bugs in my gaming group! Every one of the gods (players) in this is an archetype that most gamers will have played with (and if you've ever been Lord Warrior I hope you got yours next game along!) and may find embarrassingly familiar.
The structure of the story works extremely well, flicking back and forth between the gaming group and the hapless mortals they are manipulating for their own amusement; the use of "I didn't actually DO that" moments is well judged, with a bizarre knockon effect to the game world. The potions sequence on the cliff had me giggling out loud: I would NOT recommend reading this on public transport.
This is hysterical. Just buy it.