“As a researcher at Recorded Books, the audiobook publisher, Paul Topping hunts for precise pronunciations of foreign expressions, medical maladies and obscure geographical and biological names.” His job also requires that he keep from laughing when narrators ask him how to pronounce much simpler words. “Proper pronunciation is serious business among audiobook publishers, who are enjoying double-digit sales growth in an otherwise stagnant publishing industry. When reviewers hear gaffes, they let it rip.”