Dansk middelalderborge (Danish Medieval Castles) by Rikke Agnete Olsen with photographs by Janne Klerk is their lavishly-illustrated Danish-language survey of Danish medieval architecture and archaeology, free for a limited time courtesy of Aarhus University Press in Denmark.
This is an accessibly-written coffee table sort of book with a solid academic background, which was chosen as a Year’s Best selection for a Danish bookseller’s association.
It contains many photographs of the castles and their surrounding landscapes and interiors as they are now, as well as line illustrations showing their construction and a pictorial glossary of architectural terms. There are also accompanying texts which cover more about the castles and the daily lives of their residents in detail, including a transcription of a medieval pancake recipe. Offered DRM-free worldwide, available through the month of May.