I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived.

I mean, I guess this is required reading, just because it's Thoreau's Walden. We like to think that he was doing something spiritual with his life, communing with nature and whatnot. But in reality, he lived only a mile from town, which he frequently visited. At times, he waxes poetic about the birds and the flowers and the ice on the pond. But he was quite practical in his Walden experiment (he only lived there for two years). He lists the precise costs of building his house; talks about how much money he has saved by being a minimalist (Marie Kondo would love this guy); and boasts about how much better his life is than others' because of his restraint - even though he left that life in the end to reclaim his place in civilized society.

Others have written about nature much more lovingly. Start here:

Annie Dillard
Barbara Kingsolver
Aldo Leopold
John Muir