diff --git a/activiti-in-action.html b/activiti-in-action.html
index 02f4b478..0d9a1095 100644
--- a/activiti-in-action.html
+++ b/activiti-in-action.html
@@ -41,7 +41,8 @@
 			去 <a href="http://product.china-pub.com/3770832" style="font-size:17pt;color:red">China-Pub</a>
 			| <a href="http://item.jd.com/11599588.html" style="font-size:17pt;color:red">京东</a>
 			| <a href="http://product.dangdang.com/23622065.html" style="font-size:17pt;color:red">当当网</a>
-			预订
+			| <a href="http://www.amazon.cn/Activiti%E5%AE%9E%E6%88%98-%E9%97%AB%E6%B4%AA%E7%A3%8A/dp/B00RRCOYAQ/ref=sr_1_4?ie=UTF8&qid=1420773978&sr=8-4&keywords=activiti" style="font-size:17pt;color:red">亚马逊</a>
+			购买
 		</p>
 	</div>
 	<div style="float:right; width: 45%">