diff --git a/Makefile b/Makefile
index 47c69a5..f8295f1 100644
--- a/Makefile
+++ b/Makefile
@@ -21,5 +21,9 @@ macos:
 server:
 	go run server.go
 
+cover:
+	convert -resize 1800x2360! cover.png cover.jpg
+	convert -resize 200x262!   cover.png cover_small.jpg
+
 clean:
 	-rm -rf _book
diff --git a/cover-bak.png b/cover-bak.png
deleted file mode 100644
index d71121a..0000000
Binary files a/cover-bak.png and /dev/null differ
diff --git a/cover.jpg b/cover.jpg
new file mode 100644
index 0000000..07613e7
Binary files /dev/null and b/cover.jpg differ
diff --git a/cover_small.jpg b/cover_small.jpg
new file mode 100644
index 0000000..2c90761
Binary files /dev/null and b/cover_small.jpg differ