Let's us get back to a new browser tab here; head to spark.apache.org, and click on the Download Spark button:
Now, we have used Spark 2.1.1 in this book. So, you know, if given the choice, anything beyond 2.0 should work just fine, but that's where we are today.
Make sure you get a pre-built version, and select a Direct Download option so all these defaults are perfectly fine. Go ahead and click on the link next to instruction number 4 to download that package.
Now, it downloads a TGZ (Tar in GZip) file, so, again, Windows ...