diff --git a/README.md b/README.md
index 581cb64..373432a 100644
--- a/README.md
+++ b/README.md
@@ -10,4 +10,7 @@
 ```commandline
 python -m pip install --upgrade pip
 pip install -r requirements.txt
-```
\ No newline at end of file
+```
+
+- English: https://understanding-bitcoin.gitbook.io/understanding-bitcoin/
+- Spanish: https://understanding-bitcoin.gitbook.io/entendiendo-bitcoin/