Do a little armchair time-travel, rub elbows with a four-dimensional intelligent life form, or stretch your mind to the furthest corner of an uncharted universe. With this astonishing guidebook, Surfing Through Hyperspace, you need not be a mathematician or an astrophysicist to explore the all-but-unfathomable concepts of hyperspace and higher-dimensional geometry.

No subject in mathematics has intrigued both children and adults as much as the idea of a fourth dimension. Philosophers and parapsychologists have meditated on this mysterious space that no one can point to but may be all around us. Yet this extra dimension has a very real, practical value to mathematicians and physicists who use it every day in their calculations. In the tradtion of Flatland, and with an infectious enthusiasm, Clifford Pickover tackles the problems inherent in our 3-D brains trying to visualize a 4-D world, muses on the religious implications of the existence of higher-dimensional consciousness, and urges all curious readers to venture into "the unexplored territory lying beyond the prison of the obvious." Pickover alternates sections that explain the science of hyperspace with sections that dramatize mind-expanding concepts through a fictional dialogue between two futuristic FBI agents who dabble in the fourth dimension as a matter of national security. This highly accessible and entertaining approach turns an intimidating subject into a scientific game open to all dreamers.,P.

Surfing Through Hyperspace concludes with a number of puzzles, computer experiments and formulas for further exploration, inviting readers to extend their minds across this inexhaustibly intriguing scientific terrain.

Hyperbeings have kidnapped the president! Prolific Discover magazine columnist Pickover (Time: A Traveler's Guide, etc.) alternates expositions of math, physics and geometry with episodes of instructional science fiction while showing interested amateurs the mathematical and physical properties of higher spatial dimensions. Familiar analogies from Edwin Abbott's classic Flatland link up with odder ones from Baha'i and Christian scripture, The X-Files and the superstring theories of modern cosmologists, as Pickover explains how to trap a 4-D organism or why one twirl through a fourth dimension could turn you into your mirror image. Pickover's usual whimsy is in full force here, as he focuses on what four-dimensional organisms could (or do) look like to us: 4-D lifeforms, he explains, could make any 3-D object vanish (or reappear) by lifting it out of (or dropping it back into) our 3-D space. And 4-D creatures with anatomies analogous to ours would probably look, from our limited perspective, like sets of floating, unconnected flesh blobs. In the book's science fictional sections, "you" (a Mulder-esque FBI agent) team up with a skeptic named Sally to investigate mysterious hyperbeings. These second-person adventures seem aimed at young readers, though they don't get in the way of the more sophisticated ideas. Several substantial appendices describe puzzles and games related to hyperspace, while others explain related topics (like the mathematical entities called quaternions) or suggest further reading. Line drawings throughout. (Oct.) Copyright 1999 Cahners Business Information.