From df0b9a2948dac3f3ab69e4c014d94ba908838879 Mon Sep 17 00:00:00 2001
From: qiwang067 <qiwang067@163.com>
Date: Tue, 22 Jun 2021 23:09:32 +0800
Subject: [PATCH] fix ch5

---
 docs/chapter5/chapter5.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/chapter5/chapter5.md b/docs/chapter5/chapter5.md
index 1e70b47..eb4176d 100644
--- a/docs/chapter5/chapter5.md
+++ b/docs/chapter5/chapter5.md
@@ -264,4 +264,7 @@ $$
 ## References
 
 * [OpenAI Spinning Up ](https://spinningup.openai.com/en/latest/spinningup/rl_intro.html#)
+* [百面机器学习](https://book.douban.com/subject/30285146/)
+
+