🚀 go-pugleaf

Hi scripters

I am trying to create book package using javascript IDCS2. I have searched in Indesign object browser I have found the following code

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app.books.item(0).package();
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but this syntax is not working

the below code is works but not packageing the full book, it closes the application automatically while doing the last file of the book.

var myFolder = Folder.selectDialog("Please select a folder");

app.books.item(0).packageForPrint(myFolder, true, true, true, true, true, true,true);

Please advice me how can I package book file?

thanks

regards
a r u l