Revise mailing-list.html

Author: mattcone

_includes/mailing-list.html

@@ -6,11 +6,11 @@
     <div class="col-md-8">
       <div class="card-body" style="padding-left: 5%;">
         <h5 class="card-title no-anchor" data-toc-skip>Get the <em>Markdown Guide</em> book.</h5>
-        <p class="card-text">Learn everything you need to know about Markdown. The <em>Markdown Guide</em> helps you get started, choose a Markdown application, and master basic and extended Markdown syntax.</p>
-        <p class="card-text">✔️ PDF, MOBI, and EPUB file formats</p>
+        <p class="card-text">Learn Markdown in 60 pages. The <em>Markdown Guide</em> includes everything you need to get started, choose a Markdown application, and master the Markdown syntax.</p>
+        <p class="card-text">✔️ Professional quality PDF, MOBI, and EPUB files (DRM-free)</p>
         <p class="card-text">✔️ Unlimited free lifetime updates</p>
         <p class="card-text">✔️ 100% satisfaction guaranteed</p>
-        <a class="btn btn-success" style="margin-top: 5px" href="https://gum.co/markdownguide">Buy for $9.99</a>
+        <a class="btn btn-success" style="margin-top: 5px" href="https://gum.co/markdownguide">Buy book for $9.99</a>
       </div>
     </div>
   </div>