Question: When was was an English author, best known for his books about the teddy bear Winnie-the-Pooh only mystery novel published?

Context articles: The Scarlet Letters
Tom Hilpert
The London Eye Mystery
A. A. Milne
Janice MacDonald
The Red House Mystery
Maltese Falcon Society
Winnie-the-Pooh
In the Woods
When We Were Very Young

The Scarlet Letters is an English language novel published in 1953 by American author Ellery Queen.
 It is a mystery novel set primarily in New York City.
The Rev. Theodore "Tom" Hilpert (born 1969) is a U.S.-born author, pastor and corporate president.
 He is the author of "Galedor", a science fiction novel published in the United States in 2001 and "Surviving Seminary", a non-fiction guide for budding pastors and theologians.
 In 2009 he published "Superior Justice", a mystery novel set on Minnesota's Lake Superior Shoreline.
 He has written for several magazines, and his non-fiction work has been read on at least four different continents.
 He is currently the pastor of New Joy Fellowship.
 He is also the former Creative Director of Rebel Planet Creations, a company producing fantasy computer games in the Christian genre.
The London Eye Mystery is a children's mystery novel by English author Siobhan Dowd.
 First published in 2007, it tells the story of how Ted, a boy with Asperger syndrome, solves the mystery of how his cousin, Salim, seemingly vanishes from inside a sealed capsule on the London Eye.
 It was Dowd's second children's novel and won six awards, including the School Library Journal Best Books of the Year Award 2008.
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.
Janice Elva MacDonald (born 1959 in Banff, Alberta) is a Canadian writer of literary and mystery novels, textbooks, non-fiction, and stories for both adults and children.
 She is best known as the creator of a series of comic academic mystery novels featuring reluctant amateur sleuth Miranda "Randy" Craig, all of which are set in Edmonton, Alberta.
 The latest of these, "Another Margaret: A Randy Craig Mystery", released in September 2015, takes Miranda to a reunion of her fellow graduate school students and resurrects a mystery involving a Canadian literary figure who has been long-believed dead.
 "The Roar of the Crowd: A Randy Craig Mystery" was released on July 10, 2014, with a plot involving the Edmonton theatre scene, including the Freewill Shakespeare Festival and the Edmonton International Fringe Theatre Festival, and it went on to be nominated for the David Award for Best Mystery Novel at the 2015 Deadly Ink Conference and featured as a recommended read in both the "2015 Edmonton Travel Guide" and the 2015 "Avenue Magazine" Summer Reading Guide.
 "Condemned to Repeat: A Randy Craig Mystery," was published on June 15, 2013, and involves a series of deadly events connected to Alberta historic sites, including Rutherford House, Fort Edmonton Park, and the Ukrainian Cultural Heritage Village; it debuted in the top spot on the Edmonton Journal's bestseller list on June 21, 2013 and went on to be shortlisted for the Mary Scorer Award for Best Book by a Manitoba Publisher at the 2013 Manitoba Book Awards as well as the David Award for Best Mystery Novel at the 2014 Deadly Ink Conference.
 "Hang Down Your Head: A Randy Craig Mystery," was published in November 2011 and features "cameo" appearances by several real-life folk musicians, as well as a corpse discovered at the Edmonton Folk Music Festival.
 The book was a hit in MacDonald's home city and spent more than six months on the Edmonton Journal's Top 10 list.
 The book and its author were profiled on CBC Radio, CityTV's Breakfast Television show, in the Edmonton Journal, and in the Edmonton Examiner.
 A January 2012 cover story in "Edmonton Woman Magazine" and a half-hour interview on the CKUA Radio Network's ArtBeat program, looked more extensively at the entire mystery series.
The Red House Mystery is a "locked room" whodunnit by A. A. Milne, published in 1922.
 It was Milne's only mystery novel.
The Maltese Falcon Society is an organization for admirers of Dashiell Hammett, his novel "The Maltese Falcon," and hardboiled mystery books and writers in general.
 Founded in San Francisco in 1981, the organization is no longer active in the United States; however, a chapter in Japan has been active continuously since 1982.
 The Japanese branch of the society presents the Falcon Award, Japan's highest honor in the mystery field, to honor the best hardboiled mystery novel published in Japan.
Winnie-the-Pooh, also called Pooh Bear, is a fictional anthropomorphic teddy bear created by English author A. A. Milne.
In the Woods is a 2007 mystery novel by Tana French about a pair of Irish detectives and their investigation of the murder of a twelve-year-old girl.
 The novel won several awards such as the 2008 Edgar Award for Best First Novel by an American Author, the 2008 Barry Award for Best First Novel, the 2008 Macavity Award for Best First Mystery Novel, and the 2008 Anthony Award for Best First Novel.
When We Were Very Young is a best-selling book of poetry by A. A. Milne.
 It was first published in 1924, and was illustrated by E. H. Shepard.
 Several of the verses were set to music by Harold Fraser-Simson.
 The book begins with an introduction entitled "Just Before We Begin", which, in part, tells readers to imagine for themselves who the narrator is, and that it might be Christopher Robin.
 The 38th poem in the book, "Teddy Bear", that originally appeared in "Punch" magazine in February 1924, was the first appearance of the famous character Winnie-the-Pooh, first named "Mr. Edward Bear" by Christopher Robin Milne.
 In one of the illustrations of "Teddy Bear", Winnie-the-Pooh is shown wearing a shirt which was later colored red when reproduced on a recording produced by Stephen Slesinger.
 This has become his standard appearance in the Disney adaptations.