Kallocain: a novel from the 21st century

Leo Kall is a zealous middle-ranking scientist in the totalitarian World State who has just made a thrilling discovery: a new drug, Kallocain, that will force anyone who takes it to tell the truth. At last, criminality will be dragged out into the open and private thought can finally be outlawed. But can the World State be trusted with Kallocain? For that matter, can Kall himself be trusted?