diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index c86e2e264..3a5470fae 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -284,6 +284,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 
 ### Arduino
 
+* [Arduino-docs : A beginner's guide](https://arduino-doc.readthedocs.io/en/latest/) - Paramesh Chandra (HTML)
 * [Arduino Programming Notebook](https://unglue.it/work/152452) - Brian Evans (PDF) (:card_file_box: *archived at unglue.it*)
 * [Arduino Tips, Tricks, and Techniques](https://cdn-learn.adafruit.com/downloads/pdf/arduino-tips-tricks-and-techniques.pdf) - lady ada (PDF)
 * [Getting started with Arduino – A Beginner’s Guide](http://manuals.makeuseof.com.s3.amazonaws.com/for-mobile/Arduino_-_MakeUseOf.com.pdf) - Brad Kendall (PDF)