When it comes to oysters, Rowan Jacobsen does not mince words: “A good oyster smells like the sea breeze skipping over the shore. A bad oyster smells like a murder victim.” That pearl of wisdom is one of many you’ll find in Jacobsen’s impressive new compendium about the bivalve: “The Essential Oyster: A Salty Appreciation of Taste and Temptation.” In it, he also shares a roadmap to the best oysters in the United States.