@@ -14,14 +14,35 @@ is especially useful as a base layer of
 [CSS](/cascading-style-sheets.html) to build sites with
 [responsive web design](/responsive-design.html).
 
-<a href="http://getbootstrap.com/" style="border: none;"><img src="/img/logos/bootstrap.png" width="100%" alt="Bootstrap logo." class="technical-diagram" style="border-radius:5px"></a>
+<a href="http://getbootstrap.com/"><img src="/img/logos/bootstrap.png" width="100%" alt="Bootstrap logo." class="shot rnd outl"></a>
 
 
+## Should I use Bootstrap 3 or 4?
+[Bootstrap 3](http://getbootstrap.com/docs/3.3/) was out for almost five
+years before 
+[Bootstrap 4](http://blog.getbootstrap.com/2018/01/18/bootstrap-4/) was
+finally released at the start of 2018. When learning Bootstrap you will
+likely come across many tutorials that cover Bootstrap 3 but not version 4.
+
+If you are completely new to Bootstrap and CSS frameworks in general then
+I recommend learning Bootstrap 4. If you have already been working with
+Bootstrap 3 then there is no major rush to upgrade to the latest version.
+Bootstrap 4 is more complicated than version 3 because it has a lot more
+features so the learning curve is a bit steeper.
+
+[Full Stack Python](https://www.fullstackpython.com/) is actually built
+with an early version of Bootstrap 3. However, this site is so heavily
+customized with my own CSS that I likely will never upgrade to Bootstrap 4
+because there are no new features that I feel will be useful in my
+specific situation.
+
 
 ### Bootstrap resources
 * [Getting Started with Bootstrap](https://realpython.com/blog/python/getting-started-with-bootstrap-3/)
   provides a walkthrough of a sample starter template so you can understand
-  the [CSS](/cascading-style-sheets.html) classes that Bootstrap uses.
+  the [CSS](/cascading-style-sheets.html) classes that Bootstrap uses. There 
+  is also a follow up post that shows how to 
+  [create an effective sales page with Bootstrap 3](https://realpython.com/an-effective-sales-page-with-bootstrap-3/).
 
 * [What is Bootstrap and how do I use it?](https://www.taniarascia.com/what-is-bootstrap-and-how-do-i-use-it/)
   is an awesome tutorial that goes through many of the main Bootstrap
@@ -34,3 +55,4 @@ is especially useful as a base layer of
 * [Tabler](https://github.com/tabler/tabler) is a free, open source admin
   theme for Bootstrap 4. You can also check out a 
   [demo of the theme](https://tabler.github.io/tabler/).
+