Question: Has Judy Blume or Sandra Dallas written more non fiction books?

Context paragraphs:
Judy Blume: Judy Blume (born Judith Sussman; February 12, 1938) is an American writer known for children's and young adult (YA) fiction.  Some of her best known works are "Are You There God?  It's Me, Margaret" (1970), "Tales of a Fourth Grade Nothing" (1972), "Deenie" (1973), and "Blubber" (1974).  "The New Yorker" has called her books "talismans that, for a significant segment of the American female population, marked the passage from childhood to adolescence."

Starring Sally J. Freedman as Herself: Starring Sally J. Freedman as Herself is a 1977 young adult novel by Judy Blume.  The story is set in 1947 and follows the imaginative 10-year-old Sally, who likes to make up stories in her head, when her family moves from New Jersey to Miami Beach.  While not as controversial as some of her other novels, Blume does manage to address the following themes of late 1940s life in America: racism, anti-Semitism and sibling rivalry.  This novel is her most autobiographical, with many parallels between Blume's own life and that of Sally.  Blume has said, "Sally is the kind of kid I was at ten."

Tiger Eyes: Tiger Eyes is a young adult novel written by Judy Blume in 1981 about a 15-year-old girl attempting to cope with the unexpected death of her father.  In 2012, the novel was adapted into a film of the same name, directed by Judy's son, Lawrence Blume and starring Willa Holland as Davey Wexler.  Davey is often sad, depressed and defensive on everything.  She has a short breakdown at her brother, Jason.  Her mom becomes incapable of doing things about the house, making Davey more depressed.

Sandra Dallas: Sandra Dallas is an award-winning American author of 13 adult novels, 2 children's novels, and 7 non-fiction books.  Previously, she was an ex-reporter and bureau chief for "BusinessWeek" magazine for the Denver region.

David Sandner: David Sandner is an author and editor of fantasy literature.  His poetry and fiction have appeared in the publications "Asimov's Magazine of Science Fiction", "Weird Tales", "Realms of Fantasy", "Pulphouse", and the anthologies "Baseball Fantastic", "The Mammoth Book of Black Magic" and others.  He is also the author of non fiction books "The Fantastic Sublime: Romanticism and Transcendence in Nineteenth-century Children's Fantasy Literature" (Greenwood, 1996) and two time Mythopoeic Award Finalist "Critical Discourses of the Fantastic, 1712-1831" (Ashgate, 2011).  David is the editor of "Fantastic Literature: A Critical Reader", and co-editor of "The Treasury of the Fantastic" with Jacob Weisman (Tachyon Publications, 2013).

Catherine DeVrye: Catherine DeVrye is a Canadian born Australian author of 8 best selling non fiction books and a former Australian Executive Woman of the Year winner.

Then Again, Maybe I Won't: Then Again, Maybe I Won't is a young adult novel written by Judy Blume.  Intended for pre-teens and teenagers, the novel deals with puberty from a 1970's male perspective as well as the other trials of growing up.  Judy Blume claimed that she was inspired to write the story following the success of her preceding novel "Are You There God?  It's Me, Margaret. " Given her earlier novel was about a girl entering puberty making the transition to womanhood, she decided to write one about a boy going through puberty and making a transition to manhood.

Jaideep Varma: Jaideep Varma is an Indian writer, screenwriter and filmmaker.  He has made 5 feature films – "Hulla" (2008, fiction), "Leaving Home – the Life & Music of Indian Ocean" (2010, non-fiction), "Baavra Mann – a Film on Sudhir Mishra & Other Indian Realities" (2013, non fiction).  , I Am Offended!  (2015, non fiction) and Par Ek Din (2017, non fiction).

R.J. Robertson: R.J. Robertson (1946 – 8 April 1994) was an American writer and actor.  He is best known for working on a number of scripts with Jim Wynorski.  He also wrote some non fiction books.

The Judy Blume Diary: The Judy Blume Diary is an activity book meant to be written in for approximately one year by aspiring writers.  In 1981, Judy Blume created the book to finance her KIDS Fund, which promotes communication between children and their parents.

Supporting paragraphs: Judy Blume Sandra Dallas
Answer: Sandra Dallas is an award-winning American author of 13 adult novels, 2 children's novels, and 7 non-fiction books.