This week’s Please Explain is all about knives! Josh Donald discusses his new book, Sharp: The Definitive Guide to Knives, Knife Care, and Cutting Techniques, with Recipes from Great Chefs, which includes photographs by Molly DeCoudreaux. Donald’s knowledge as a premier knife purveyor and go-to knives expert serves his readers well by offering practical advice on how to buy and care for good knives. He includes step-by-step instructions as well as 15 recipes from great chefs—including Stuart Brioza of State Bird Provisions and Melissa Perello of Frances—which feature all the cuts that mark an accomplished cook. This segment is guest hosted by Melissa Clark.