I recently stumbled upon the term "Finlandisation" and wish to know more about the path it took to survive.
The term is heavily political but the writing does not have to be regarding the politics. Anything regarding Finland during that era is welcome.
You could look at Urho Kekkonen: A Statesman for Peace edited by Keijo Korhonen, written in 1975.
The book focuses on the long-term president of Finland, Urho Kekkonen, and his policies with respect to foreign relations with the Soviet Union and with Western Europe. It includes contributions from Finnish, American and other international scholars. Since it was written in 1975, it is written in the context of an ongoing Cold War. So, it lacks information that has become available since the opening of the Soviet archives in the last 25 years. Also, it can't discuss the last 10 years of the Kekkonen presidency (until 1986), which were still to come when the book was published.
With all those caveats, I think the book is highly relevant to the question of Finlandization.