Congratulations to Audun Dybdahl, leader of the Center for Middle Ages Studies of NTNU in Trondheim, on the publication of his latest book, Tiendpengeskatten som kilde til folk og samfunn ca. 1520, Med alle skatteytere fra Sunnfjord til Namdalen. It's about tax records from ca. 1520 for Trøndelag and Møre og Romsdal counties and, of special interest to genealogists, it contains the names of each individual taxpayer (an amazing feat of deciphering archaic handwriting and obsolete spellings). It sells for NOK 275 (about $41 USD) and is available at Bokklubben, at Tapir Akademisk Forlag (the publisher), and possibly elsewhere.
If you are in the U.S., I would strongly suggest using a credit card rather than sending a bank draft when buying books from Norway because the bank charges are very substantial.