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diff --git a/create_book.sh b/create_book.sh
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--- a/create_book.sh
+++ b/create_book.sh
@@ -1,7 +1,9 @@
 #!/bin/bash
 echo "execute a bash script that will create a book called " $1
+index=$(shuf -i 1-14 -n 1)
+echo $index
 
-pandoc /home/xpub/www/html/tl-dr/book.html  -o /home/xpub/www/html/tl-dr/logged_book.epub  -c print.css --metadata  title="$1" --metadata author="/var/shelf"  --epub-cover-image=cover.jpg --epub-embed-font='fonts/Cascadia/ttf/CascadiaCode-Light.ttf' --epub-embed-font='fonts/Ductus/DuctusRegular.otf'
+pandoc /home/xpub/www/html/tl-dr/book.html  -o /home/xpub/www/html/tl-dr/logged_book.epub  -c print.css --metadata title="$1" --metadata author="/var/shelf"  --epub-cover-image=assets/cover$index.jpg --epub-embed-font="fonts/Cascadia/ttf/CascadiaCode-Light.ttf" --epub-embed-font="fonts/Ductus/DuctusRegular.otf"
 cp /home/xpub/www/html/tl-dr/logged_book.epub /home/xpub/www/html/tl-dr/log-books/"$1".epub
 
 ls log-books > /home/xpub/www/html/tl-dr/log-books/all.txt