I found this book pretty convincing:<p><a href="https:&#x2F;&#x2F;www.amazon.com&#x2F;Dont-Sell-Your-Coat-Surprising-ebook&#x2F;dp&#x2F;B0072VSQFQ#productDescription_secondary_view_div_1462936873778" rel="nofollow">https:&#x2F;&#x2F;www.amazon.com&#x2F;Dont-Sell-Your-Coat-Surprising-ebook&#x2F;...</a>