ONSOY HISTORIE, Binds III & IV, Terje Schou, Fredrikstad Kommune, 1996 & 1999.  These are two volumes covering 1537-1801 for the former municipality of Onsoy which was merged into the County of Ostfold in the year 2000.  Volume 3 is 340pp, volume 4 is 408pp. Both books are printed on glossy paper and feature numerous illustrations and photographs.