Book excerpt: What do you do when you use a metaphor? Or a simile or analogy? Can you tell the difference between a synecdoche and a metonymy? What are the secret tricks used every day by professional persuaders? In this learned little volume, illustrated by Merrily Harpur, rhetoricians Adina Arvatu and Andrew Aberdein demonstrate the principles of Rhetoric via its key figures and devices, using copious examples to show how all human communication deploys the time-tested techniques of this elegant and ancient art. "Fascinating" FINANCIAL TIMES. "Beautiful" LONDON REVIEW OF BOOKS. "Rich and Artful" THE LANCET. "Genuinely mind-expanding" FORTEAN TIMES. "Excellent" NEW SCIENTIST. "Stunning" NEW YORK TIMES. Small books, big ideas.