DMT The Spirit Molecule, Rick Strassman
Prometheus Rising, Robert Anton Wilson
The Alchemy of Air, Thomas Hager
Fast Food Nation:  The Dark Side of the All-American Meal, Eric Schlosser
On Writing, Stephen King
A Song of Ice and Fire, George R.R. Martin
The Hobbit, J.R.R. Tolkien
Frankenstein, Mary Shelly
The Prize, Daniel Yergin
The Singularity is Near, Ray Kurzweil
Nutrition and Physical Degeneration, Weston A. Price
Oedipus Rex, Oedipus at Colonus, Antigone, Sophocles
Tales of a Shaman's Apprentice, Mark J. Plotkin
The Cosmic Serpent, Jeremy Narby
Son of the Revolution, Liang Heng, Judith Shapiro
Sphere, Michael Crichton
Congo, Michael Crichton
The Botany of Desire, Michael Pollan
How to Change Your Mind, Michael Pollan
The Autobiography of Malcom X, Malcom X, Alex Haley
AC/DC:  The Savage Tale of the First Standards War, Tim McNichol
Children of the Sun, Alfred W. Crosby
On the Road, Jack Kerouac
Dharma Bums, Jack Kerouac
Big Sur, Jack Kerouac 
The Elements of Style, William Strunk Jr., E.B. White
Born to Run, Christopher McDougall
Zen and the Art of Motorcycle Maintenance, Robert M. Pirsig
Siddhartha, Hermann Hesse
1984, George Orwell

Useful resources for physical books, audio books, and readers include:  Libro.fm, Barnes and Noble, Powell's, Auntie's Bookstore, and eBay.