5009208
9780881841824
Alex Balfour, a young history professor, travels back in time to Petrograd in 1917, determined to rescue Czar Nicholas and his family from assassination. In the sequel, Twice Upon a Time (1988), Alex helps two Native Americans on display at the 1876 Philadelphia Centennial Exposition escape from their captors, and then finds himself in South Dakota on the eve of the Battle of Little Bighorn. The third book in the series is Till the End of Time (Doubleday, 1990).Appel, Allen is the author of 'Time after Time' with ISBN 9780881841824 and ISBN 088184182X.
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