Science journalist John Bohannon was shocked by the results of his sting operation to expose predatory publishers. Academic librarian Jeffrey Beall found himself threatened with a billion-dollar lawsuit and much more when he published a black list of predatory journals. He believes they’re the “biggest threat to science since the Inquisition”. This podcast tells the story and includes an interview with Jeffrey Beall, the librarian who first shed light on the problem and what happened to him when he tried to stop these publishers from scamming scholars.