Debra DeSalvo, The Language of the Blues (Billboard Books). From “Alcorub” to “Zuzu,” Ms. DeSalvo combines solid research with humor, insight and straightforward description to explain the often arcane terms that populate blues songs. You may have an idea about the various meanings of “easy rider,” but how about “faro,” “biscuit,” “cooling board?” “Mojo” gets two full pages. The book is more than a dictionary; it’s a lesson in the Southern black culture that took root in rural blues and spread throughout the world. That’s no woofin’ (page 158).