Book excerpt: Since "The Far Side's debut in January 1980, fans have bought more than 40 million "Far Side books and more than 60 million calendars. Now, at long last, the ultimate "Far Side book has arrived as a hefty, deluxe, two-volume slipcased set. A masterpiece of comic brilliance, The Complete Far Side contains every "Far Side cartoon ever syndicated--over 4,000 if you must know-presented in (more or less) chronological order by year of publication, with more than 1,100 that have never before appeared in a book. Creator Gary Larson offers a rare glimpse into the mind of "The Far Side in quirky and thoughtful introductions to each of the 14 chapters. Complaint letters, fan letters, and queries from puzzled readers appear alongside some of the more provocative or elusive panels, and actor, author, and comedian Steve Martin offers his pithy thoughts in a foreword.