I have read several of Davidson's books and generally enjoy them - they're quick and funny reads. I read the first of the trilogy (The Royal Treatment) a few months back and couldn't quite make up my mind about it, but I thought I'd give the second novel a go anyway.
By quarter of the way through, it had started to grate on my nerves. I just found the characters SO irritating; they were either 'starchy' or, as with the main royal characters, brash and idiotic. One or two characters with these traits you could pass over, but it was virtually all of them! For me, when I realized I got fed up with the characters, it ruined the rest of the book.