included C++ Programming: Code patterns design (#10954)

Co-authored-by: Arthur Verissimo <Arthur@CastGroup.Local>

books/free-programming-books-langs.md

@@ -521,6 +521,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [C++ Language](http://www.cplusplus.com/doc/tutorial/)
 * [C++ Notes for Professionals](https://goalkicker.com/CPlusPlusBook) - Compiled from StackOverflow Documentation (PDF)
 * [C++ Programming](https://en.wikibooks.org/wiki/C%2B%2B_Programming) - Panic, et al.
+* [C++ Programming: Code patterns design](https://en.wikibooks.org/wiki/C%2B%2B_Programming/Code/Design_Patterns) - WikiBooks (HTML)
 * [C++ Succinctly, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/cplusplus) (PDF, Kindle) (email address *requested*, not required)
 * [C++ Tricks](http://www.bordoon.com/cplusplus/book_wrapper.html)
 * [C++ Tutorial](https://www.cprogramming.com/tutorial/c++-tutorial.html) - Alex Allain