The beloved, influential classic. Once upon a time, or more precisely 50 years ago, Roger Tory Peterson and a seabird biologist sidekick James Fisher made a 100-day, 30,000-mile dash around the continent to see what was what in the world of birds and nature. They traveled mostly along the coast from Cape St. Mary's, deep into Mexico and north along the Pacific coast to St. Paul in the Pribilof Islands, incidentally setting a record for the most bird species sighted in a year.  (NAM26, $17.00)