Readers hoping Rick Bass’ new work of nonfiction, “The Wild Marsh: Four Seasons at Home in Montana,“ would advocate on behalf of his beloved Yaak Valley will have to be satisfied with a few paragraphs that appear on Page 5. “I have spent the bulk of my adult life advocating for the permanent protection of these wilder, farther places in the Yaak through the congressional designation of wilderness areas,“ Bass writes. “But right here, right now, is—in this book—the only time you’ll hear me carry on about any of that.“