This is my first Ian Rankin novel. Although I find the TV version of Rebus (BBC) interesting and stylish, the episodes are very moody, dark and gristly. I was a little worried that the book would be the same way, however, it was excellent, witty and complicated! The reader took a little getting used to, but I got into it and enjoyed it.
I am giving it 4 stars instead of five because I thought the ending was good, but not great.
Another reviewer refers to the "new, mellower" Rebus, so maybe the earlier works are violent. I can only say that I will keep on reading Rankin!