A Crystal Age is a utopian novel written by W. H. Hudson, first published in 1887. The book has been called a "significant S-F milestone" and has been noted for its anticipation of the "modern ecological mysticism" that would evolve a century later.

William Henry Hudson (August 1841 – 1922) was an author, naturalist and ornithologist. Hudson was born of U.S. parents living in the Quilmes Partido in Buenos Aires Province, Argentina, where he spent his youth studying the local flora and fauna and observing both natural and human dramas on what was then a lawless frontier. ‘Far Away and Long Ago’ is a classic memoir of a boy, fascinated by nature, on the Pampas in the 19th century.

“Green Mansions: A Romance of the Tropical Forest” is a narration of his life story by Abel, a Venezuelan, to a comrade. Once a wealthy young man, he meddled in politics to the extent of provoking a revolution… which failed.Escaping into the tropical forests of Guyana Abel takes up gold hunting, then journal-writing, and fails at both. Now with no aim for his life, he drifts until he takes up residence with a remote Indian tribe. Soon he learns of a wood the Indians avoid, as it is inhabited by a dangerous Daughter of the Didi, who, they say, slew one of them with magic...

Hudson wrote this classic work in 1910; it is admiringly mentioned by many other writers. It focuses on the memories of a head shepherd, Caleb Bawcombe, so it is concerned with the period of mid to late nineteenth century rural Wiltshire, a county in England. This pleasant engaging book contains rural wisdom, natural history, farming practices, human characters, and more

Hudson traveled to Patagonia to study the birds, but shortly upon arrival accidentally shot himself in the knee, requiring a lengthy period of idleness to recover, hence the title of the book. It's not just a work of ornithology, but a personal memoir of the people and natural history of Patagonia.