This is my first book, published in 2010. It has over 700 pages and was nominated as one of the best non fiction books in Finland (Tietofinlandia 2010). The reprint is now available from Adlibris, but they sell only in Scandinavia I think.
You can ask for this book (and the second one (in Finnish) contacting joni@pyysalo.com.
This is the second part of the first book (over 700 pages again), published in 2014. This complites the first book by dealing with sami knives and knife belts and having numerous examples of fine historical puukko, that were not available for the first book.
This is also available now.
You can inquire this book (in Finnish) contacting joni@pyysalo.com.
This is the first book, somewhat shortened and translated in Germany by Wieland Verlag
It is available from Amazon and other bookstores:
https://www.amazon.com/Das-Puukko/dp/3938711779
This is the somewhat shortened first book in English by Schiffer Publications.
It is available from Amazon and many other bookstores: Amazon.com: The Puukko: Finnish Knives from Antiquity to Today (9780764360701): Ruusuvuori, Anssi: Books