Absolutely. I love all the Preston & Child books. I also find it interesting that I don't care greatly for any of their individual work, but as collaborators they really hit the spot.
I've read them from the beginning. I liked that they were a little off-beat and mysterious. I started being a little disappointed in the series when Pendy and Constance became closer. I also didn't care for his "sons" Helen Trilogy. I lost interest when the whole premise of his character changed and he wore Panama hats and white linen suits. I stopped collecting the series at #16, The Obsidian Chamber.