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Now why did I buy this....?,
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This review is from: How to Develop a Super-power Memory (Paperback)
This is a book originally published in 1958, with this edition from 1986, so I'd guess it's kind-of longevity has something to do with useful content!
Over the time since publication I'd expect there to be some perspective changes, but the essentials are the same...to develop a better memory. A brief look at the content points to the use of common sense, but it's amazing how we can hone our mind simply by highlighting some aspect by writing it down.