Frie Fugler's publishing house is a player in book publishing that specializes in outdoor books and local history books. The publisher has a particular focus on mysticism and superstitions linked to Oslomarka, and publishes works that deal with both known and unknown stories from the area. The books include stories about marka originals and notable personalities who have been part of Oslomarka's rich cultural history.
The publications from Frie Fugler's publishing house are richly illustrated, with a combination of both new and historical images. The publisher collects stories from various parts of Oslomarka, including Nordmarka, Krokskogen, Lillomarka and Østmarka. The books are designed to offer readers an entertaining experience while providing insight into local cultural history.