One book that comes to mind includes: incest, mass-murder, regicide, prejudice, violence and torture amongst the material in it... and yet it is readily available to anybody (including minors).
A Song of Ice and Fire, I bet.
And I agree, if they really care that much about restricting adult material for the younger audiences, they really should start putting age restrictions on books. They, and many comics also for that matter, are far worse than what passes for acceptable in movies and games. Allthough mature comics are usually marked with "suggested for mature readers" or something similar.
And hey, if that game really does make it out in Norway against present odds, we can probably work something out.