Not a series, per se, Bijou, just his trademark, I guess. He HAS published a few novels minus the "The" in the title, but it seems that he has no trouble publishing novels. Personally, I really enjoyed The Resort, which I read last year. All his books are enjoyable, I think, but some better than others. I like his writing style.
I probably read them too close together so that they began to seem samey. I did enjoy the first two I read so maybe having had a long break I should try again.