> Does anybody know which MARC21 tag/subtag is indicated to record book's
> author, special/secondary price, and pages number?
There's lots of information on MARC21 at the Library of Congress' MARC
Standards Office website:
You may be especially interested in "MARC 21 Lite,"
https://www.loc.gov/marc/bibliographic/lite/ and you can look up in there
information on MARC21 tags 100 ("personal name main entry," often the
book's author), 037 subfield c (for price), and 300 for pages.
Technical Services Librarian
San Francisco Maritime National Historical Park Research Center
2 Marina Blvd., Bldg. E, 3rd floor, San Francisco, CA 94123-1284
Koha mailing list http://koha-community.org