Tainted Blood is a wonderful introduction to Indridason's work. The novel is set in a grey, rainy Iceland, with a number of characters whose lives are damaged or flawed. Some parts are suitably depressing, and there is a streak of fatalism in the characters that is reminiscent of Henning Mankell's work.
I shall give none of the plot away, except to note that the Icelandic location proves to be important - part of the plot would be implausible anywhere else. The two leading detectives make a well-matched pair, and Erlandur's relations - or lack of them - with his ex-wife and children are a recurrent theme in the novel. A pat on the back too for the excellent translation; I speak no Icelandic, so I cannot tell whether it is accurate, but it manages to convey differences between characters' backgrounds in the dialogue and to give the strong impression that the book was written in English in the first place.