Both beginning/novice amateur astronomers (at the level of Astronomy and Night Sky magazine readers), as well as more advanced amateur astronomers (level of Sky & Telescope) will find this book invaluable and fascinating.Amateur astronomers are always contemplating the "next telescope up" and this will point the way to the most suitable instrument to which they should aspire. Similarly, those who are buying their first telescope - and these days not necessarily a low-cost one - will be able to compare and contrast different types and makes.
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