this fixes #252

Author: runemadsen

content/tutorials/text/getting-started/index.mdx

@@ -10,13 +10,13 @@ order: "01"
 
 <Note>
 
-This tutorial was adapted from the book, [Getting Started with Processing](http://processing-website-user-testing.s3-website-us-east-1.amazonaws.com/download), by Casey Reas and Ben Fry, Maker Media 2015. If you see any errors or have comments, please [let us know](https://github.com/processing/processing-website/issues).
+This tutorial was adapted from the book, [Getting Started with Processing](https://www.oreilly.com/library/view/make-getting-started/9781457187070/), by Casey Reas and Ben Fry, Maker Media 2015. If you see any errors or have comments, please [let us know](https://github.com/processing/processing-website/issues).
 
 </Note>
 
 ## Getting started
 
-Welcome to Processing! Start by visiting [https://processing.org/download](http://processing-website-user-testing.s3-website-us-east-1.amazonaws.com/download) and selecting the Mac, Windows, or Linux version, depending on what machine you have. Installation on each machine is straightforward:
+Welcome to Processing! Start by visiting [https://processing.org/download](https://processing.org/download) and selecting the Mac, Windows, or Linux version, depending on what machine you have. Installation on each machine is straightforward:
 
 - On Windows, you'll have a .zip file. Double-click it, and drag the folder inside to a location on your hard disk. It could be Program Files or simply the desktop, but the important thing is for the processing folder to be pulled out of that .zip file. Then double-click processing.exe to start.
 - The Mac OS X version is also a .zip file. Double-click it and drag the Processing icon to the Applications folder. If you're using someone else's machine and can't modify the Applications folder, just drag the application to the desktop. Then double-click the Processing icon to start.