Yes I have read many of their books. I especially like the stories about Elisa and John Murphy. (Zion Legacy) I also like the books about Shiloh (Shiloh Legacy). I have not read their newest series yet. I don't know or they are published in the Netherlands.
Because I am a historian I am sometimes critical about the historical setting of this kind of books, but as far as I know they are quiet reliable when they talk about historical events.