This 2007 book provides a concise overview of variable stars, including a historical perspective, an introduction to stars in general, the techniques for discovering and studying variable stars, and a description of the main types of variable stars. It is especially suitable for undergraduate students and experienced amateur astronomers.

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John R. Percy is Professor of Astronomy and Astrophysics at the University of Toronto. He is the world authority on variable star observation and author of books on astronomy and science education (especially astronomy).

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