Creating an add-on "product type book" for ZC 1.5

[philou]

do you import 100 books with 100 authors, or maye 100 books with 20 authors?

If you want to hear seomthing positive, then I think you will find that importing books as "normal" products, conevrting them to bookx and then mass assign genre, authors, series you will find it takes less time and is less headache than trying to work out duplicates and missing matches :)

best,
p.