Book on missionary Lars Rostvig, Madagascar

I am trying to find a book on the missionary Lars Rostvig (1846-1936) who worked in Madagascar. In an earlier topic Jan Peter mentioned the book "Lars Røstvig, Pionér på solskinnsøya [ie. Lars Røstvig, a Pioneer on the Sunny Island (Madagascar)] 203 pages, illustrated. Published in Stavanger, year unknown. Author: parish priest Reidar Bolling (1902-76). The only one I can identify on the web is "Lars Røstvig: Pionermisjonær pa Vest-Madagaskar (Norwegian Edition) by Gabriel Nakkestad (Unknown Binding - 1979)" but it is not presently available. Please is anyone able to help me find a copy of either/both of these books? Karen.