Country may be the plainspoken music of rural America, but it certainly got gussied up on its way to the hit parade. Rhinestones and Twanging Tones: The Look and Sound of Country Music shows in glittering detail how most classic country stars traded in their overalls for sequined and spangled outfits that shone from a mile away, and strummed guitars that were often just as ornately bedecked, or customized by decades of road wear. These...