Add Modern Object Pascal Introduction for Programmers by Michalis Kamburelis (#5433)

books/free-programming-books.md

@@ -1330,6 +1330,7 @@ Kerridge (PDF) (email address *requested*, not required)
 
 * [Essential Pascal Version 1 and 2](http://www.marcocantu.com/epascal/) - M. Cantù
 * [Expert Delphi](https://www.packtpub.com/free-ebooks/expert-delphi) - Paweł Głowacki (Packt account *required*)
+* [Modern Object Pascal Introduction for Programmers](https://github.com/michaliskambi/modern-pascal-introduction) - Michalis Kamburelis ([AsciiDoc](https://github.com/michaliskambi/modern-pascal-introduction/blob/master/modern_pascal_introduction.adoc#logical-relational-and-bit-wise-operators), [HTML](https://castle-engine.io/modern_pascal_introduction.html), [PDF](https://castle-engine.io/modern_pascal_introduction.pdf))
 
 
 ### DTrace