"Offal" has the same pronunciation as "awful"--an appropriate homophone, given that offal comprises the whole spectrum of an animal's glands, essential organs, skin, muscle, guts, and every unmentionable in between. Yet as Nina Edwards shows in this intriguing history, offal has been consumed and enjoyed across ages and continents, often hidden by the rich variety of terms--like fois gras and sweetbread--that have evolved to veil their origins. Edwards...