Close Range: Wyoming Stories by Annie Proulx — the definitive literary voice of this landscape. Hard, spare short fiction set in Wyoming ranch country; some of the best American writing of the past thirty years. Read it before you come and the sagebrush flats will look different.
Rising from the Plains by John McPhee — superb long-form journalism about Wyoming geology and the ranch families who have worked this land for generations. McPhee makes the geology feel like drama. Quiet and essential.
Teewinot: A Season in the Grand Tetons by Jack Turner — Wyoming mountain writing at its best. Turner spent decades as a climbing guide in the Tetons and writes about the high country with precision and feeling.
Wyoming Fishing Guide by Ken Retallic — the practical companion for anyone planning serious time on the North Platte or other Wyoming waters. River by river, season by season.