[1] In 1955 Kjellström published a very popular book on outdoor land navigation and the sport of orienteering, Be Expert With Map and Compass.
To date, it has sold more than 500,000 copies in English and has been translated into several languages, and has remained continuously in print since its first publication.
[1] In later years Kjellström moved to Pound Ridge, N.Y., where he helped develop trails in a county park and forest reserve called Ward Pound Ridge Reservation and to produce a detailed orienteering map of the area.
Kjellström died 26 August 1995 in a hospital in Stockholm, Sweden due to complications of Parkinson's disease.
[3] From 1998, Johnson Outdoors distributed Silva compasses in North America made to its specifications by third-party manufacturers, while Silva of Sweden AB distributed compasses assembled at its Haninge, Sweden facility to markets outside of North America,[3] and later from production facilities in China.