Question: The author of the books that Margaret Tempest is best known for her illustrations of wrote how many books?

full_context: Document 1: The Tale of Mrs. Tittlemouse: The Tale of Mrs. Tittlemouse is a children's book written and illustrated by Beatrix Potter, and published by Frederick Warne & Co. in 1910. The tale is about housekeeping and insect pests in the home, and reflects Potter's own sense of tidiness and her abhorrence of insect infestations. The character of Mrs. Tittlemouse debuted in 1909 in a small but crucial role in "The Tale of The Flopsy Bunnies", and Potter decided to give her a tale of her own the following year. Her meticulous illustrations of the insects may have been drawn for their own sake, or to provoke horror and disgust in her juvenile readers. 25,000 copies of the tale were initially released in July 1910 and another 15,000 between November 1910 and November 1911 in Potter's typical small book format.
Document 2: Alba Bouwer: Albertha Magdalena Bouwer (16 March 1920 – 5 October 2010) was a South African Afrikaans-writing journalist and author. She is best known for her series of children's stories about the experiences of a small girl called Alie growing up in the fictional location Rivierplaas in rural Free State. Late in life she published a novel for adults, "Die afdraand van die dag is kil" (The close of the day is cold, 1992), about two women in old age.
Document 3: A. A. Milne: Alan Alexander Milne ( ; 18 January 1882 – 31 January 1956) was an English author, best known for his books about the teddy bear Winnie-the-Pooh and for various poems. Milne was a noted writer, primarily as a playwright, before the huge success of Pooh overshadowed all his previous work. Milne served in both World Wars, joining the British Army in World War I, and was a captain of the British Home Guard in World War II.
Document 4: The Velveteen Rabbit: The Velveteen Rabbit (or How Toys Become Real) is a children's book written by Margery Williams (also known as Margery Williams Bianco) and illustrated by William Nicholson. It chronicles the story of a stuffed rabbit and his desire to become real, through the love of his owner. The book was first published in 1922 and has been republished many times since.
Document 5: Margery Williams: Margery Williams Bianco (22 July 1881 in London, England – 4 September 1944 in New York City) was an English-American author, primarily of popular children's books. A professional writer since the age of nineteen, she achieved lasting fame at forty-one with the 1922 publication of the classic that is her best-known work, "The Velveteen Rabbit" (1922).
Document 6: Beatrix Potter: Helen Beatrix Potter (28 July 186622 December 1943) was an English writer, illustrator, natural scientist, and conservationist best known for her children's books featuring animals, such as those in "The Tale of Peter Rabbit".
Document 7: Margaret Tempest: Margaret Mary Tempest (1892–1982) was a British illustrator and author, best known for her illustrations of Alison Uttley's Little Grey Rabbit books.
Document 8: Phyllis Reynolds Naylor: Phyllis Reynolds Naylor (born January 4, 1933) is an American writer best known for children's and young adult fiction. Naylor is best known for her children's-novel quartet "Shiloh" (a 1992 Newbery Medal winner) and for her "Alice" book series, one of the most frequently challenged books of the last decade.
Document 9: The Tale of Benjamin Bunny: The Tale of Benjamin Bunny is a children's book written and illustrated by Beatrix Potter, and first published by Frederick Warne & Co. in September 1904. The book is a sequel to "The Tale of Peter Rabbit" (1902), and tells of Peter's return to Mr. McGregor's garden with his cousin Benjamin to retrieve the clothes he lost there during his previous adventure. In "Benjamin Bunny", Potter deepened the rabbit universe she created in "Peter Rabbit", and, in doing so, suggested the rabbit world was parallel to the human world but complete and sufficient unto itself.
Document 10: Margaret Mayo (Children's author): Margaret Mayo, née Margaret Mary Cumming (born 10 May 1935 in London, England), is a British writer of children's literature and folktales since 1974.
Document 11: Jane Thayer: Jane Thayer (the pen name of Catherine Woolley, August 11, 1904 – July 23, 2005) was an American writer. She is known best for the book "The Puppy Who Wanted A Boy", which became the basis of a 1980s Saturday Morning cartoon series, "The Puppy's Further Adventures". Jane Thayer wrote 86 books for children, many of which ("The Blueberry Pie Elf" and "The Puppy Who Wanted a Boy for Christmas") have become classics. She was so prolific that her editor suggested she publish some of her works under a pen name. Thus, Catherine authored picture books under the pen name of Jane Thayer, while writing books for older children and adults under her real name.
Document 12: Peter Cottontail: Peter Cottontail is a name temporarily assumed by a fictional rabbit named Peter Rabbit in the works of Thornton Burgess, an author from Springfield, Massachusetts. In 1910, when Burgess began his "Old Mother West Wind" series, the cast of animals included Peter Rabbit. Four years later, in "The Adventures of Peter Cottontail", Peter Rabbit, unhappy at his plain-sounding name, briefly changed his name to Peter Cottontail because he felt it made him sound more important. He began putting on airs to live up to his important-sounding name, but after much teasing from his friends, soon returned to his original name, because, as he put it, "There's nothing like the old name after all." In the 26-chapter book, he takes on the new name partway through chapter 2, and returns to his "real" name, Peter Rabbit, at the end of chapter 3. Burgess continued to write about Peter Rabbit until his retirement in 1960, in over 15,000 daily syndicated newspaper stories, many of them featuring Peter Rabbit, and some of them later published as books, but "Peter Cottontail" is never mentioned again.
Document 13: Alison Uttley: Alison Uttley (17 December 1884 – 7 May 1976), "née" Alice Jane Taylor, was a British writer of over 100 books. She is now best known for her children's series about Little Grey Rabbit, and Sam Pig.
Document 14: The Tale of Peter Rabbit: The Tale of Peter Rabbit is a British children's book written and illustrated by Beatrix Potter that follows mischievous and disobedient young Peter Rabbit as he is chased about the garden of Mr. McGregor. He escapes and returns home to his mother, who puts him to bed after dosing him with camomile tea. The tale was written for five-year-old Noel Moore, son of Potter's former governess Annie Carter Moore, in 1893. It was revised and privately printed by Potter in 1901 after several publishers' rejections, but was printed in a trade edition by Frederick Warne & Co. in 1902. The book was a success, and multiple reprints were issued in the years immediately following its debut. It has been translated into 36 languages, and with 45 million copies sold it is one of the best-selling books of all time.
Document 15: Beverly Cleary: Beverly Atlee Cleary (née Bunn; born April 12, 1916) is an American writer of children's and young adult fiction. One of America's most successful living authors, 91 million copies of her books have been sold worldwide since her first book was published in 1950. Some of Cleary's best known characters are Henry Huggins and his dog Ribsy, Ramona Quimby and Beezus Quimby, and Ralph S. Mouse.
ground_truth: over 100