Question: Patricia Burford Ryan, an American writer of romance novels,  is the twin sister of the romance writer Pamela Burford whose books are currently available as what type of books?
Sentence (from "Pamela Burford"): She is an award-winning author of 14 contemporary romance and romantic suspense novels, and she is the twin sister of the author Patricia Ryan (aka P.B. Ryan).
Relevant evidence: No