You can enter the extra fields like description and cover art, but they do not make it to the final .imp.
The final .imp will contain only seven Book Properties:
Code:
1. ebookID: (i.e. ebook:guid-0ef4b4cc7cd24578b7c66bb8bc0f7113)
2. Category: (taken from Bookstore tab - Bookshelf Category - i.e. General Interest)
3. SubCat(not used): (used to store total # of pages i.e. small view=out and large view=in: outPages=9&inPages=15)
4. Title: (taken from Edition info tab - Title i.e. Test Title)
5. LastName: (not used i.e. blank)
6. MiddleName: (not used i.e. blank)
7. AuthorFirstName: (taken from Edition info tab - Author i.e. Test Author)