What do they mean by that (re the last sentence)?"Anita Diamant's fiction career was launched with the publication of her bestseller, The Red Tent, by St. Martin's Press and Picador, which has sold close to 3 million copies to date and been published in fourteen countries. This property is actively represented by Carolyn Jenks Agency."
My guess--I'm sure someone will correct me if I'm wrong--is that the agency sold that particular book, and then the two parted ways, but that due to the agency agreement the agency still handles that particular book, or something along those lines. I could be wrong, though.