When one of those irritating self-help books actually gets it right, then unnatural and worrying times are just around the corner . . .

While the rest of the country is joining the new HappinessTM cult, Edwin (the wiry, grey-suited, low-level editor at US publisher Panderic Press) is in trouble. A cartel of drug, alcohol, tobacco and drug-rehab bosses have a contract out on him.

It's all the fault of the mysterious Tupac Soiree, and his book What I Learned on the Mountain. But who is Tupac? And how can Edwin stop the world from succumbing to this plague of HappinessTM?

Will Ferguson has created a comic masterpiece, a brutal satire of modern times.