Question: Who used the imprint of Badger Books to publish books in a number of genres, including the genre that must have an emotionally satisfying and optimistic ending?

Context paragraphs:
Romance novel: The romance novel or romantic novel discussed in this article is the mass-market literary genre.  Novels of this type of genre fiction place their primary focus on the relationship and romantic love between two people, and must have an "emotionally satisfying and optimistic ending."  There are many subgenres of the romance novel including fantasy, historical romance, paranormal fiction, and science fiction.  Walter Scott defined the literary fiction form of romance as "a fictitious narrative in prose or verse; the interest of which turns upon marvellous and uncommon incidents".

List of English-language literary presses: Literary presses are publishing companies that publish books with a literary or artistic emphasis.  This is a list of publishing companies and imprints whose primary emphasis is on literature and the arts.  It does not include exclusively online publishers, academic publishers (who often publish very limited print runs, but for a different market), or businesses operating solely as printers, such as print-on-demand companies or vanity presses.

John Glasby: John Stephen Glasby (23 September 1928 – 5 June 2011) was a prolific author born in the United Kingdom whose work spanned a range of popular genres.  A professional research chemist and mathematician, he produced more than 300 novels and short stories during the 1950s and 1960s, most of which were published pseudonymously under the Badger Books imprint.

Factotum (arts organisation): Factotum is both an arts organisation and artists' project that was formed in 2001 by Stephen Hackett and Richard West.  They publish The Vacuum newspaper, put on exhibitions, publish books and make films.  In the past they have also run a choir, staged contemporary dance events and organised talks.  In 2005 Factotum won a Paul Hamlyn Award for the Visual Arts and participated in Northern Ireland's first showing in the Venice Biennale.  In 2007 they were selected for the Irish Curated Visual Arts Award by the artist Mike Nelson.  Factotum's work often involves collaborating with a wide range of other arts organisations, artists and writers.

Badger Books: Badger Books was an imprint used by the British publisher John Spencer & Co. between 1960 and 1967.  Badger Books were published in a number of genres, predominantly war, westerns, romance, supernatural and science fiction.  The best-known author of Badger Books is Lionel Fanthorpe, who wrote a large proportion of the supernatural and science fiction titles.

Creative city: The creative city is a concept developed by Australian David Yencken in 1988 and has since become a global movement reflecting a new planning paradigm for cities.  It was first described in his article 'The Creative City', published in the literary journal "Meanjin".  In this article Yencken argues that while cities must be efficient and fair, a creative city must also be one that is committed to fostering creativity among its citizens and to providing emotionally satisfying places and experiences for them.

Heinrich Eduard Jacob: Heinrich Eduard Jacob (7 October 1889 – 25 October 1967) was a German and American journalist and author.  Born to a Jewish family in Berlin and raised partly in Vienna, Jacob worked for two decades as a journalist and biographer before the rise to power of the Nazi Party.  Interned in the late 1930s in the concentration camps at Dachau and then Buchenwald, he was released through the efforts of his future wife Dora, and emigrated to the United States.  There he continued to publish books and contribute to newspapers before returning to Europe after the Second World War.  Ill health, aggravated by his experiences in the camps, dogged him in later life, but he continued to publish through to the end of the 1950s.  He wrote also under the pen names Henry E. Jacob and Eric Jens Petersen.

Black Dog Books (Australian publisher): Black Dog Books was an independent publisher and production house based in Fitzroy, Victoria, Australia.  In 2011 the company was acquired by Walker Books and turned into an imprint.  They publish books in all genres but focus mainly on children's literature.

Mango Books: Mango Books, children's imprint in English from DC Books, aims to publish books that will find a place in every household.  Mango’s publications fall into every category such as fiction, children’s literature, poetry, reference, classics, folktales and biographies.  Mango has also licensed content to Real Reads, UK.

Breakwater Books: Breakwater Books Ltd. is a Canadian publishing company based in Newfoundland and Labrador.  Although the company began as a way for local authors in Newfoundland and Labrador to publish their work without leaving the province, Breakwater now publishes works from authors throughout Canada and the UK.  The company places a strong emphasis on publishing books that preserve and celebrate the culture of Newfoundland and Labrador, although they publish books in many different genres.  The company is also known for its publication of educational materials for schools, and was the first company in Atlantic Canada to do so.  As of 2004, Breakwater had published over 600 titles, releasing between 10 and 15 titles every year.

Supporting paragraphs: Badger Books Romance novel
Answer: John Spencer & Co.