In his witty way, Mr. Safire enlightens us concerning proper usage, correct pronunciation, the roots of our daily discourse, and the vacuous vogue lingo in which "subsume" is co-opting "co-opt," wood-burning stoves become "energy systems," and stores that sell eyeglasses squint out at us as "vision centers."He is aided in his campaign for precision and clarity in language by a legion of word buffs, language lovers, and learned eccentrics--many of them world-class wordsmen in their own right.Here are Mr. Safire's delightful, crotchety, subtly informative, and awesomely informed comments, decisions, and advisories--the best of his famous column in The New York Times. Plus scores of letters written by enthusiastic or furious readers, who glory in nailing an expert to the wall.