Named for a cloud that hung in the evening sky when Annie Proulx first visited, Bird Cloud is 640 acres of Wyoming wetlands and prairie with cliffs plunging down to the North Platte River. She knew she had to purchase it, and what she would build there - a house in harmony with her work, her appetites and her character. This is that story, along with an enthralling natural history and archaeology of the region, a family history, and an illuminating autobiography.