This is the fourth book I've read in this series (read #4 first, then went from the beginning) and I've enjoyed them all. They've got some great characters - all "different" to the norm, all with new things to discover as the series moves along. The crimes are suitably awful - criminals that toy with the cops, and that think up some bizarre themes and ways of murder.

I have one complaint - there was too much explanation about characters and previous events. These could have been inserted more subtly.