When I first started to read Keiserns Galning, I thought it might be an autobiography. Not that it fits with Jaan's actual timeline, but either way it felt as if the author wrote it a very long time ago, and naturally had to be dead now.
Then I learned that he was very much alive. I decided that Jaan Kross therefore is immortal. Kind of like a vampire, except he writes to stay alive instead of sucking blood.
When I received the news that he had just passed away, I was proven wrong. He is not immortal. But I expect that also this assumption is wrong, and that we will receive new reports of Jaan Kross sightings in Bermuda on January 31st 2012.
As for Keiserns Galning, I have not completed reading it. The book is still in some box after the last move, so I'm not completely sure where it's located.