• The Knot of King Gordius (Co-author), 2016
  • Slægten Roos fra Sønderjylland [The Roos family], privately published, 2000
  • Slægten Jagd [The Jagd family], privately published, 19
  • Fra Hvide til Hundevad [Family history from year 1000 to 1900], privately published, 1993

Examples of articles in magazines and books

Kolding 1580
  • Historien om en lille gård i Dalby [The history of a small farm in Dalby parish], Koldingbogen, 1999
  • En industriarbejderfamilie i Tved [The history and lives of a working family in Tved], Koldingbogen 2002
  • Andreas og Jacobine – livsvilkår 1880-1950 [Living conditions 1880-1950], Koldingbogen 2005
  • Jens Sørensen Hundevad (1577-1659) – hans liv og samtid [The life of a chaplain 1577-1659], Koldingbogen 2008
  • Sydjydsk Amatørteater [History of an amateur theater], Koldingbogen 2009
  • Erik Påske – en kongelig fra Kolding [the biography of an actor and singer], Koldingbogen, 2010
  • Da Peter fandt sin familie i Danmark [the history of Peter finding his family in Denmark], Slægt & Data, juni 2011

Reviews of the book "Slægten Roos fra Sønderjylland"

Hans H. Worsøe reviewed the book in the prominent genealogy magazine ”Personalhistorisk Tidsskrift” (2001, nr. 1):

"The author of this extensive family book, Per Andersen, has published family books before such as "From Hvide to Hundevad" (1993) and "The Jagd Family" (1996) as well as other publications. The relation to the Danish family Roos is through his grandmother Inger Elisabeth Roos who died in 1966 when the author was 10 years old. In this book he focuses on the family name Roos and limit the scope to decendants of the Roos family from Roskæmmergaard in Vandling, Starup parish near Haderslev. .... Even if other Roos families are not included, the book nevertheless provides information about most people with the name "Roos", which gives the special scope some merit. Therefore it is also important that the book has an extensive index.

The book includes several parts which makes it more interesting than so many other family books, such as statistics on the names in the family and an appendix with a number of documents, and the book also has a historical overview and a word dictionary. Five sections with the title "Days in the history of the Roos family" are also very interesting as long as one understands that they are a combination of real facts and fiction... The most important point is, however, that it is clearly stated what is fiction and what are facts.

The books shows the practical nature of the author. The layout has been made with WordPerfect, the photos and illustrations are fine and the book is easy to navigate - it is generally a quality and solid work and each chapter includes the sources used. Both traditional archive sources have been used as well as sources from private archives and personal archives, such as the papers from professor Carl Roos at the Royal Library. Also the analysis of this somewhat controversial person seems to be well balanced. As the first complete book on the Roos family, it fills very adequately a gap in the ordinary, Danish genealogy literature".

Another review was published in Sønderjysk Månedsskrift, June 2001:

"Without doubt the historical discipline most appealing to the population is family research. Many people use years of there lives to research the history of their families, writing family trees and analysing the sources in order to find as much information about each individual as possible. For most people the work stops here, but fortunately there are some who tries to make their research available to other people. Per Andersen has published his research in a fine book ...

The first part of the book deals with the first generations of the family, while the second part is a more traditional review of family members up to current times. It is all very easy to navigate which is not always the case for family literature, and for people with an interest in the part of Denmark around Haderslev there is a lot material of interest in the book".