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on July 23, 2001
Although Dr. Nahin may be a seasoned explorer of ideas involving time travel, his failure to used organized paragraphs and effective examples greatly lowered the value of this how-to book.
Nahin also omitted the concept of parallel universes entirely. (A now popular belief, that as soon as a traveler breaks his own space-time barrier and moves back in time, the universes splits into two identical entities, the original universe where you came from is the one you can never return to. This may sound disheartening, but this is the only conceivable way in which the time traveler would not induce changes in histories, and therefore time paradoxes.)
Books like this deserve to be better.
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