Links to the Amazon  (Ebook, Paperback, Hardcover):

Ebook:  

 https://www.amazon.com/dp/B0D96W2NSJ

Hardcover and Paperback:   

https://www.amazon.com/dp/826937511X

Link to LULU (Hardcover with dust jacket and Paperback):

https://www.lulu.com/search?page=1&sortBy=RELEVANCE&q=Geir+sivertsen 

Link to Barnes & Noble (Paperback and Hardcover):

https://www.barnesandnoble.com/s/Geir%20Sivertsen

Link to Ingramspark (Paperback and Hardcover):

https://bookshop.org (sometimes not responsive when searching specific titles.)