I started reading them in January after someone recommended them on here and I've been hooked. I'm currently on holiday in Italy and have just finished the penultimate one. I now have The Last Remains to go.
I know some of the storylines can be a bit far fetched but I've just loved reading them and seeing the characters develop.
Im going to be truly bereft when I've finished it.
If anyone has any recommendations of something similar, a series of books, I'd be happy to investigate.