diff --git a/free-programming-books-es.md b/free-programming-books-es.md
index 7a2ebc66f4383042bac9695b6544329c7e4fbad1..4e609b64e8edc52fece1b68ae93eaaf2a48826c3 100644
--- a/free-programming-books-es.md
+++ b/free-programming-books-es.md
@@ -43,6 +43,7 @@
 
 ###Ruby
 
+* [Ruby en 20 minutos](https://www.ruby-lang.org/es/documentation/quickstart/)
 * [Guía para aprender a programar con Ruby. Adaptación al español del libro "Learn to Program" de Chris Pine](https://github.com/rubyperu/aprende.a.programar)
 
 ###Haskell