Much as we authors like to think even our business or self-help books are the next best thing since How To Win Friends And Influence People, ego must be dumped and business acumen must prevail. Bottom line: with nonfiction books the question of whether or not to write one has to be a business decision.
It needs to be taken in the same way as a decision to introduce a new product or service. With nearly all nonfiction (and fiction too, up to a point) there is usually room for a good new book on the market, provided it’s likely to attract a substantial group of readers because:
**It’s about something entirely new and very interesting that no-one has written about before or
**It’s about something that’s not new, but to which you contribute something entirely new and very interesting
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