The author presents a "bioplan" for re-establishing trees native to North America, displaying twenty different tree groups with an eye for their medicinal indications, long known to American Indians, and the protection of the fragile balance of the environment against global warming and pollution.

 Part of her mission has been the creation of her own forest in Canada of native North American trees where she has cultivated rare and endangered species of trees. With this significant knowledge and experience at hand, Beresford-Kroger shares ideas for placing these plants in a garden, including suggesting which others to add to advantage. Not at all dull reading, the botanical, medical, and scientific aspects of trees are presented in language of a mystic and complemented by her husband Christian Kroger's stunning photographs.  She summons all this, with her lifelong love for trees, to her fervent passion of saving the earth from devastation by human ignorance and greed.