Sack grew up around books. Her mom was a hand bookbinder and, before opening Omnivore, she worked at an auction house as a rare book specialist. So while two-thirds of her shop's stock is new releases, the rest is dedicated to antiquarian books. "I love finding treasures of rare antiquarian books," Sack says. That's where she discovers books from the Depression era with gems like tips on roadside marketing, as in, pile your melons high if your farm is at a dip in the road.