I too have found it interesting to learn a bit about Sweden's social problems from these books.
Joan, I found some interesting information about the Wallander books and their publication dates. It looks like all the novels have been translated into English (he may be still working on the last one "Worried Man"-2009) but the order in which they have been published in the U.S. is NOT the order in which he wrote them!!
See
http://www.inspector-wallander.org/guide/timeline.htmlTimeline of the Kurt Wallander Mystery Series
# Title Series Original Swedish Publication Date
1 The Pyramid Kurt Wallander 1999
2 Faceless Killers Kurt Wallander 1991
3 The Dogs of Riga Kurt Wallander 1992
4 The White Lioness Kurt Wallander 1993
5 The Man Who Smiled Kurt Wallander 1994
6 Sidetracked Kurt Wallander 1995
7 The Fifth Woman Kurt Wallander 1996
8 One Step Behind Kurt Wallander 1997
9 Firewall Kurt Wallander 1998
10* The Return of the Dancing Master Stefan Lindman 2000
11 Before the Frost Linda Wallander 2002
12** The Grave Kurt Wallander 2004
13 The Worried Man Kurt Wallander 2009
* "The Return of the Dancing Master" marks the creation of a new Henning Mankell detective named Stefan Lindman. It is unknown if this will become a continuing series or if it is a single work. Interestingly, associates of one of the murder victims from the Kurt Wallander novel Sidetracked make a substantial appearance in this novel.
** The following Kurt Wallander work has not yet been translated into English:
Händelse om hösten (The Grave), a short story from 2004 published only in The Netherlands.