diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index 00e645375..3e6fd1583 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -434,6 +434,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 
 * [256-Color VGA Programming in C](http://www.brackeen.com/vga/) - David Brackeen
 * [A Tutorial on Pointers and Arrays in C](https://web.archive.org/web/20180827131006/http://home.earthlink.net/~momotuk/pointers.pdf) - Ted Jensen (PDF)
+* [Algorithms Design (in C)](https://www.ime.usp.br/~pf/algorithms/) - Paulo Feofiloff (HTML)
 * [An Introduction to C & GUI Programming](https://magpi.raspberrypi.com/books/c-gui-programming) - Simon Long (PDF)
 * [Bare-metal programming for ARM](https://github.com/umanovskis/baremetal-arm) - Daniels Umanovskis [(PDF)](http://umanovskis.se/files/arm-baremetal-ebook.pdf)
 * [Beej's Guide to C Programming](http://beej.us/guide/bgc/) - Brian "Beej Jorgensen" Hall (HTML, PDF)