diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index 260d3be6b062499411968353172d97e96416e06a..6fae6e9beac9f74ca38e04861cf2a47cd9866949 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -1286,6 +1286,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 
 * [Kotlin Notes for Professionals](https://goalkicker.com/KotlinBook/) - Compiled from StackOverflow documentation (PDF)
 * [Kotlin Official Documentation](https://kotlinlang.org/docs/reference/)
+* [Learning Kotlin](https://riptutorial.com/Download/kotlin.pdf) (PDF)
 
 
 ### LaTeX / TeX