Philippa Gregory has thoroughly researched and reliable written historical novels, which I suggest this designation also shy away, because under this category as much superficial nonsense is sold. PG provides the legible version for pure historical science book for readers who seriously deal with it, but not the same to study history.
Incidentally, I know a few German authors, the story so unschnörkelig, well researched and still represent interesting - this ability is rather unfortunately in the English-speaking authors.
