add Scala for the Impatient back to the books page

it used to be there, but was removed (in scala#1706) because it
had fallen out of date. but there's a Scala 3 edition now.

Author: SethTisue

_books/3-scala-for-the-impatient.md

@@ -0,0 +1,23 @@
+---
+title: "Scala for the Impatient"
+link: https://horstmann.com/scala/
+image: /resources/img/books/scala_for_the_impatient.jpg
+status: Updated for Scala 3
+authors: ["Cay Horstmann"]
+publisher: Addison-Wesley Professional
+publisherLink: https://www.oreilly.com/publisher/addison-wesley-professional/
+---
+
+What you get:
+
+* Up to date coverage of Scala 3
+* A rapid introduction to Scala for programmers who are competent in another language such as Java, C#, Python, JavaScript, or C++
+* Blog-length chunks of information that you can digest quickly
+* An organization that you'll find useful as a quick reference
+
+What you don't get:
+
+* An introduction into programming or object-oriented design
+* Religion about the superiority of one paradigm or another
+* Cute or academic examples
+* Mind-numbing details about syntax minutiae