chai2010
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@@ -27,8 +27,9 @@ server:
 	go run server.go
 
 cover:
-	convert -resize 1800x2360! cover.png cover.jpg
-	convert -resize 200x262!   cover.png cover_small.jpg
+	convert A20181610.jpg cover.png
+	convert -resize 1800x2360! A20181610.jpg cover.jpg
+	convert -resize 200x262!   A20181610.jpg cover_small.jpg
 
 
 # https://chai2010.cn/advanced-go-programming-book
 
@@ -17,6 +17,10 @@
 - 网址：https://github.com/chai2010/advanced-go-programming-book
 - Star历史：https://starcharts.herokuapp.com/chai2010/advanced-go-programming-book.svg
 
+购买链接：
+
+- https://www.epubit.com/book/detail/40090
+
 ## 在线阅读
 
 - [SUMMARY.md](SUMMARY.md)
 
@@ -8,6 +8,10 @@
 - 作者：曹春晖，Github [@cch123](https://github.com/cch123)
 - 网址：https://github.com/chai2010/advanced-go-programming-book
 
+购买链接：
+
+- https://www.epubit.com/book/detail/40090
+
 ## 在线阅读
 
 - https://chai2010.cn/advanced-go-programming-book/