The five volumes are:

13 historier om den danske velfærdsstat (2003) [Histories on the Danish Welfare State

13 udfordringer til den danske velfærdsstat (2004) [Challenges to the Danish Welfare State

13 reformer af den danske velfærdsstat (2005) [13 Reforms of the Danish Welfare State]

13 løsninger for den danske velfærdsstat (2006) [13 Solutions for the Danish Welfare State]

13 Værdier bag den danske velfærdsstat (2007) [13 Values behind the Danish Welfare State]

You can read more about the volumes and download selected essays by clicking the links above. Please note that the essays are written in Danish.