Bruji

When I enter a book, the ISBN number does not get entered. Is there a way to select a group of books and have all the correct numbers added, or must I do it manually for each book? Thanks.

It depends on the website you're using for the searches. Not all sites include ISBNs in their results but you can do an advanced search for the entries to try and gather the ISBNs.
Using the little gear button in the add/edit window is usually a better option than using the 'get advanced info' menu command since that downloads the first search result returned. The gear button in turn lets you select the correct result if there is more than one returned.