Update free-programming-books-langs.md (#11098)

The link give previous links to a closed-down site following two links you can get to the message that the data is now on the internet archive where you can then search for the book link provided points directly to the text

books/free-programming-books-langs.md

@@ -543,7 +543,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [Modern C++ Tutorial: C++11/14/17/20 On the Fly](https://www.changkun.de/modern-cpp/pdf/modern-cpp-tutorial-en-us.pdf) - Changkun Ou (PDF)
 * [More C++ Idioms](https://en.wikibooks.org/wiki/More_C%2B%2B_Idioms) - Sumant Tambe, et al. (WikiBooks)
 * [Open Data Structures (In C++)](http://opendatastructures.org/ods-cpp.pdf) - Pat Morin (PDF)
-* [Programming Fundamentals - A Modular Structured Approach using C++](https://learning.hccs.edu/faculty/ken.busbee/programming-fundamentals-a-modular-structured-approach-using-c) - Kenneth Leroy Busbee (PDF)
+* [Programming Fundamentals - A Modular Structured Approach using C++](https://archive.org/details/cnx-org-col10621/mode/1up) - Kenneth Leroy Busbee (PDF)
 * [Software Design Using C++](http://cis.stvincent.edu/html/tutorials/swd/) - Br. David Carlson, Br. Isidore Minerd
 * [Software optimization resources](http://www.agner.org/optimize/) - Agner Fog
 * [The Boost C++ libraries](http://theboostcpplibraries.com) - Boris Schäling (HTML)