Twelve Dimension-shattering tales of travel across time... Twelve dimension-shattering tales of time travel, featuring John Varley, Ursula K. LeGuin, Joe Haldeman, Avram Davidson, Damon Knight, Nancy Kress, R.A. Lafferty, Jack McDevitt, Bridget McKenna, Richard McKenna, Charles Sheffield, and James Tiptree, Jr. These stories take readers from everyday reality into the infinite vistas of time and space -- as far as the man can reach. "The Man Who Walked Home" by James Tiptree, Jr. "Air Raid" by John Varley "The Hole on the Corner" by R. A. Lafferty "Trapalanda" by Charles Sheffield "Arachon" by Damon Knight "Hole-in-the-Wall" by Bridget McKenna "Time's Arrow" by Jack McDevitt "Anniversary Project" by Joe Haldeman "The Secret Place" by Richard McKenna "The Price of Oranges" by Nancy Kress "Full Chicken Richness" by Avram Davidson "Another Story" by Ursula K. Le Guin At the publisher's request, this title is sold without DRM (Digital Rights Management).

Scientists of 1987 are forced to determine whether their time machine, previously used only for historical research, can also be used to alter history both past and future.

There are various arguments for the metaphysical impossibility of time travel. Is it impossible because objects could then be in two places at once? Or is it impossible because some objects could bring about their own existence? In this book, Nikk Effingham contends that no such argument is sound and that time travel is metaphysically possible. His main focus is on the Grandfather Paradox: the position that time travel is impossible because someone could not go back in time and kill their own grandfather before he met their grandmother. In such a case, Effingham argues that the time traveller would have the ability to do the impossible (so they could kill their grandfather) even though those impossibilities will never come about (so they won't kill their grandfather). He then explores the ramifications of this view, discussing issues in probability and decision theory. The book ends by laying out the dangers of time travel and why, even though no time machines currently exist, we should pay extra special care ensuring that nothing, no matter how small or microscopic, ever travels in time.

DigiCat Publishing presents to you this unique and meticulously edited SF time travel collection:_x000D_ H. G. Wells:_x000D_ The Time Machine_x000D_ Ayn Rand:_x000D_ Anthem_x000D_ Mark Twain:_x000D_ A Connecticut Yankee in King Arthur's Court_x000D_ H. Beam Piper:_x000D_ Flight from Tomorrow_x000D_ Philip K. Dick:_x000D_ The Skull_x000D_ The Variable Man_x000D_ Fritz Leiber:_x000D_ The Big Time_x000D_ Andre Norton:_x000D_ Key Out of Time_x000D_ The Time Traders_x000D_ The Defiant Agents_x000D_ Lester Del Rey:_x000D_ Pursuit_x000D_ ...And It Comes Out Here_x000D_ August Derleth:_x000D_ A Traveler in Time_x000D_ Frederik Pohl:_x000D_ The Tunnel Under the World_x000D_ The Day of the Boomer Dukes

More than 400 films and 150 television series have featured time travel--stories of rewriting history, lovers separated by centuries, journeys to the past or the (often dystopian) future. This book examines some of the roles time travel plays on screen in science fiction and fantasy. Plot synopses and credits are listed for films and TV series from England, Canada, the UK and Japan, as well as for TV and films from elsewhere in the world. Tropes and plot elements are highlighted. The author discusses philosophical questions about time travel, such as the logic of timelines, causality (what's to keep time-travelers from jumping back and correcting every mistake?) and morality (if you correct a mistake, are you still guilty of it?).

This book is a treatise on time and on background independence in physics. It first considers how time is conceived of in each accepted paradigm of physics: Newtonian, special relativity, quantum mechanics (QM) and general relativity (GR). Substantial differences are moreover uncovered between what is meant by time in QM and in GR. These differences jointly source the Problem of Time: Nine interlinked facets which arise upon attempting concurrent treatment of the QM and GR paradigms, as is required in particular for a background independent theory of quantum gravity. A sizeable proportion of current quantum gravity programs - e.g. geometrodynamical and loop quantum gravity approaches to quantum GR, quantum cosmology, supergravity and M-theory - are background independent in this sense. This book's foundational topic is thus furthermore of practical relevance in the ongoing development of quantum gravity programs. This book shows moreover that eight of the nine facets of the Problem of Time already occur upon entertaining background independence in classical (rather than quantum) physics. By this development, and interpreting shape theory as modelling background independence, this book further establishes background independence as a field of study. Background independent mechanics, as well as minisuperspace (spatially homogeneous) models of GR and perturbations thereabout are used to illustrate these points. As hitherto formulated, the different facets of the Problem of Time greatly interfere with each others' attempted resolutions. This book explains how, none the less, a local resolution of the Problem of Time can be arrived at after various reconceptualizations of the facets and reformulations of their mathematical implementation. Self-contained appendices on mathematical methods for basic and foundational quantum gravity are included. Finally, this book outlines how supergravity is refreshingly different from GR as a realization of background independence, and what background independence entails at the topological level and beyond.

In every age and in every walk of life there are people are who are eager for new ideas and new points of view to enlighten their lives. John Luque, an ordinary but irrepressible casino gambler, was one of these adventurous spirits. He had accidentally become the owner of a "window" to a much larger universe than he'd ever imagined, a universe filled with infinite realities and infinite possibilities. A place of unquestionable amusement for anyone who chose to enter.