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 "Patricia Ryan (author)"): Patricia Burford Ryan (born August 9, 1954 in Las Cruces, New Mexico, United States) is an American writer of romance novels as Patricia Ryan and mystery novels as P.B. Ryan.
Relevant evidence: Yes