Silent Spring

A Sand County Almanac

Aldo Leopold

Walden; Or, Life in the Woods

Henry David Thoreau

Zen and the Art of Motorcycle Maintenance

Robert M. Pirsig

Siddhartha

Hermann Hesse

On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life

Charles Darwin

Pilgrim at Tinker Creek

Annie Dillard

Nineteen Eighty-Four

George Orwell

Into the Wild

Jon Krakauer

Il Principe

Niccolò Machiavelli

Fahrenheit 451

Ray Bradbury

Catch-22

Joseph Heller

The Grapes of Wrath

John Steinbeck