The alimentary canal -- the much-maligned tube from mouth to rear -- is as taboo, in its way, as the cadavers in Stiff, and as surreal as the universe of zero gravity explored in Packing for Mars. In Gulp we meet the scientists who tackle the questions no one else thinks —or has the courage —to ask. How much can you eat before your stomach bursts? Why doesn't the stomach digest itself? Can wine tasters really tell a $10 bottle from a $100 bottle? Why is crunchy food so appealing? Can constipation kill you? Did it kill Elvis? We go on location to a pet food taste-test lab, a fecal transplant, and into a live stomach to observe the fate of a meal. Like all of Roach's books, Gulp is as much about human beings as it is about human bodies.

Praise for Gulp:

• In her latest rollicking foray into taboo, icky, and underappreciated aspects of the human body, best-selling science writer Roach takes readers on a wild ride down the alimentary canal. Not that the author of Stiff (2003), Bonk (2008), and Packing for Mars (2010) ever takes a direct route anywhere. No, voraciously curious and intrepid Roach zips off in whatever direction her ardor for research and irrepressible instinct for the wonderfully weird lead her. She begins this hilarious, mind-expanding inquiry into eating, digestion, and elimination with the symbiosis between smell and taste, guided by an olfactorily gifted sensory analyst, then profiles Horace Fletcher, proponent of a rigorous chewing routine known as Fletcherizing practiced by Henry James and Franz Kafka. We learn more than one can imagine about saliva and our passion for crispy and crunchy foods. Given Roachs fascination with what we find disgusting, scientific obsessions and bizarre experiments, and horrifying things we do to ourselves, the stories get stranger as she proceeds down the body. Roach interviews a prison inmate about rectal smuggling (including cell phones), tells tales of flatulence, and reveals the truth about Elvis Presleys fatal megacolon. For all her irreverence, Roach marvels over the fine-tuned workings and wisdom of the human body, and readers will delight in her exuberant energy, audacity, and wit.
  —Donna Seaman, Booklist, starred review
• Fans of lively writing will be delighted by the newest monosyllable from Mary Roach. Once again Roach boldly goes where no author has gone before, into the sciences of the taboo, the macabre, the icky, and the just plain weird. And she conveys it all with a perfect touch: warm, lucid, wry, sharing the unavoidable amusement without ever resorting to the cheap or the obvious. Yum!
  —Steven Pinker, Harvard College Professor of Psychology and author of How the Mind Works
• It's as gross as one might expect, but it's also enthralling. ... Roach's approach is grounded in science, but the virtuosic author delights in giving readers a thrill.
  —Publisher's Weekly, starred review

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