diff --git a/books/free-programming-books-subjects.md b/books/free-programming-books-subjects.md
index 237d44d96..bce310da4 100644
--- a/books/free-programming-books-subjects.md
+++ b/books/free-programming-books-subjects.md
@@ -665,6 +665,7 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 * [Encyclopedia of Human Computer Interaction 2nd Edition](https://www.interaction-design.org/literature/book/the-encyclopedia-of-human-computer-interaction-2nd-ed)
 * [Essential Image Optimization](https://images.guide) - Addy Osmani
 * [Foundations of Programming](https://openmymind.net/FoundationsOfProgramming.pdf) - Karl Seguin (PDF)
+* [Front-end Debugging Tools Handbook](https://github.com/lala-hakobyan/front-end-debugging-handbook) - Lala Hakobyan
 * [Front-End Developer Handbook 2016](https://frontendmasters.com/guides/front-end-handbook/2016/) - Cody Lindley (HTML)
 * [Front-End Developer Handbook 2017](https://frontendmasters.com/guides/front-end-handbook/2017/) - Cody Lindley (HTML)
 * [Front-End Developer Handbook 2018](https://frontendmasters.com/guides/front-end-handbook/2018/) - Cody Lindley (HTML)