“ Together with Finnish journalist Johanna Elomaa, I wrote the book "Sukellus Valoon" (Diving into the Light) about my experiences during the rescue mission and how it changed my life” ^ From page 2 of the article. I Googled for this book but wasn’t able to find anywhere to buy it. Supposed to have been published in 2018. Perhaps no English version yet... was anyone able to find the book?
https://www.johannaelomaa.com/books/sukellus-valoon/#mctmp
I’d bet an English version will be not too far in the future (I hope!)