'A relentless haunting and haunted figure devils the man [Eiseley] and twists from him some of the best prose we have...The beauty of "The Invisible Pyramid" is that it communicates the awesome spectacle of our environmental crisis without a single shrill note...Eiseley is a master of significant anecdote. There is an unstated but real gothic terror prowling behind his vision' - "New York Times Book Review".In 1910, young Loren Eiseley watched the passage of Halley's Comet with his father. The boy who became a famous naturalist was never again to see the spectacle except in his imagination. That childhood event contributed to the profound sense of time and space that marks "The Invisible Pyramid". This collection of essays, first published shortly after Americans landed on the moon, explores inner and outer space, the vastness of the cosmos, and the limits of what can be known. Bringing poetic insight to scientific discipline, Eiseley makes connections between civilizations past and present, multiple universes, humankind, and nature. Loren Eiseley's many works include "The Night Country", also a Bison Book. Introducing "The Invisible Pyramid" is Paul Gruchow, a professor of English at Concordia College and the author of "Boundary Waters: The Grace of the Wild".