Paul van Bodengraven and Marco Barten are both passionate hikers. They have published nine walking guides so far, of which three have now been translated to English (Rhodes, Varmland and now Dalarna). Besides their regular jobs, each year they use their holidays to work on a new guide, on destinations that haven't been covered by others. Each walk is undertaken and described by the authors. They also take all the photos. The concept of the guides differs from any other series with much emphasis placed on pictures.