Add/correct info

[Halvor (Raknes)]

page count per my copy: 152 (ISBN 8203240208, last page unnumbered)

append the following text to the description, in italics, and also add it as a librarian's note:

This is a dual ISBN first edition (same physical volume, two ISBNs). This page has the publisher, Aschehoug's ISBN. The book club ISBN is 82-525-3281-0 / 978-82-525-3281-4.

[Alina]

done.