"Here's a gem of a book...all peppered with delightful notes from science fiction films, novels, and comics. I can turn a page without finding a jewel." Clifford Stoll, University of California, Berkeley, author of The Cuckoos Egg

"The first edition a ] was the most thorough compendium ever written on time travel in science fictiona ]scientifically accurate and at the same time largely accessible to a broad audience of non-specialistsa ]I have been struck by the richness and complexity of the tapestry of ideas that Nahin presents a ]" Kip Thorne

"The research that has gone into this book is impressive. The author has a made a good selection of ideas from the scientific literature on spacetime, causality violation and time-travel paradoxes, and they are presented at a popular level with science-fiction plots running in parallel." Nature

FROM THE REVIEWS:

SFRA REVIEW
"Dr. Nahin has done a fine job with this book. [This book] is an excellent synthesis of the current state of the philosophical and physical discussion on time travel. His use of science fiction to illustrate the possibilities of this research make his work very readable for the layperson as well as the scientist. His explanation why H.G. Wellsa (TM)s time machine wouldna (TM)t work (it does not move in space) is particularly engaginga ][it] is an excellent addition to the discussion of time travel.a