Book excerpt: A cookbook for today's oyster renaissance. Whether it's the straightforward simplicity of a casserole, the velvety smoothness of a soup, or the explosiveness of a certain po-boy, oysters enrich a variety of dishes. This fourth volume of the Louisiana Seafood Bible provides more than 75 of the best oyster recipes in the state. Also included are interviews, shucking techniques, and a history of the Croatian immigrants whose lives and culture are intertwined with the oyster business.