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index.html

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           <p>—Pomax (or in the tweetworld, <a href="https://twitter.com/TheRealPomax">@TheRealPomax</a>)</p>
 
           <div className="note">
+            <h2>Note: virtually all Bézier graphics are interactive.</h2>
+
+            <p>This page uses interactive examples, relying heavily on <a href="http://pomax.github.io/bezierjs/">Bezier.js</a>,
+            as well as "real" maths (in LaTeX form) which is typeset using the most excellent <a href="http://MathJax.org">MathJax</a> library.
+            The page is generated offline as a React application, using Webpack, which has made adding
+            "view source" options considerably more challenging. I'm still trying to figure out how to
+            add them back in, but it didn't feel like it should hold up deploying this update compared
+            to the previous years' version.</p>
+
             <h2>This book is open source.</h2>
 
             <p>This book is an open source software project, and lives on two github repositorites. The
@@ -156,6 +165,15 @@
             of these, and pretty much do with them as you please, except for passing it off as your
             own work wholesale, of course =)</p>
 
+            <h2>How complicated is the maths going to be?</h2>
+
+            <p>Most of the mathematics in this Primer are early high school maths. If you understand basic
+            arithmetic, and you know how to read English, you should be able to get by just fine. There
+            will at times be <em>far</em> more complicated maths, but if you don't feel like digesting
+            them, you can safely skip over them by either skipping over the "detail boxes" in section
+            or by just jumping to the end of a section with maths that looks too involving. The end of
+            sections typically simply list the conclusions so you can just work with those values directly.</p>
+
             <h2>Questions, comments:</h2>
 
             <p>If you have suggestions for new sections, hit up the <a href="https://github.com/pomax/BezierInfo-2/issues">github
@@ -164,8 +182,20 @@
             but you can use the issue tracker for that as well. Once the rewrite is done, I'll add a general
             comment section back in, and maybe a more topical "select this section of text and hit the
             'question' button to ask a question about it" system. We'll see.</p>
+
+            <h2>Buy me a coffee?</h2>
+
+            <p>If you enjoyed this book, or you simply found it useful for something you were trying to
+            get done, and you were wondering how to let me know you appreciated this book, you can
+            always <a class="link" href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=QPRDLNGDANJSW"
+            >buy me a coffee</a>, however much a coffee is where you live. This work has grown over the
+            years, from a small primer to a 70ish print-page-equivalent reader on the subject of Bézier
+            curves, and a lot of coffee went into the making of it. I don't regret a minute I spent
+  on writing it, but I can always do with some more coffee to keep on writing!</p>
+
           </div>
         </section>
+
       </div>
     </article>