diff --git a/markdown/00.cover.md b/markdown/00.cover.md
index f8adc7f0b..a72cb26e1 100644
--- a/markdown/00.cover.md
+++ b/markdown/00.cover.md
@@ -18,6 +18,7 @@ def teach_yourself(anything):
 
 teach_yourself(coding)
 ```
+https://github.com/xiaolai/xiaolai.github.io/blob/master/the-craft-of-selfteaching/README.md
 
 ## 目录