Added the The Official Raspberry Pi Handbook 2023[pdf]

books/free-programming-books-langs.md

@@ -2057,7 +2057,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [Raspberry Pi: Measure, Record, Explore](https://leanpub.com/RPiMRE/read) - Malcolm Maclean (HTML)
 * [Raspberry Pi Users Guide (2012)](http://www.cs.unca.edu/~bruce/Fall14/360/RPiUsersGuide.pdf) - Eben Upton (PDF)
 * [The Official Raspberry Pi Project Book 1 (2015)](https://magpi.raspberrypi.com/books/projects-1) (PDF)
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+* [The Official Raspberry Pi Handbook 2023](https://magpi.raspberrypi.com/books/handbook-2023/pdf/download)
 
 ### REBOL