Short answers, pulled from the story.
Macmillan Publishers was founded in London in 1843 by Scottish brothers Daniel and Alexander Macmillan, who came from the Isle of Arran, Scotland. Daniel handled the business side while Alexander built the literary list.
Macmillan published Lewis Carroll's Alice's Adventures in Wonderland in 1865 and Rudyard Kipling's The Jungle Book in 1894. The company also launched the scientific journal Nature in 1869 and the Grove Dictionary of Music and Musicians in 1877.
Harold Macmillan was Prime Minister of the United Kingdom from the 10th of January 1957 to the 18th of October 1963, and the grandson of company co-founder Daniel Macmillan. He worked at the firm as a junior partner from 1920 to 1940, returned from 1945 to 1951, and became chairman after retiring from politics in 1964, holding that role until 1974.
Macmillan Publishers has been wholly owned by the Holtzbrinck Publishing Group since 1999. The company operates with offices in 41 countries and operations in more than 30 others.
In January 2010, Macmillan demanded that Amazon adopt an agency pricing model following Apple's announcement of the iPad. Amazon initially removed all Macmillan titles from its site, but on the 31st of January 2010 agreed to the agency model. In April 2012, the US Department of Justice sued Macmillan and other publishers for alleged e-book price-fixing; a federal judge approved a settlement in December 2013 that required the publishers to compensate affected customers.
Pan Macmillan is the British publishing arm of Macmillan Publishers. It formed in 1990 when Pan Books, which Macmillan had become sole owner of in 1986, merged with Macmillan's trade division. Pan Macmillan was named Publisher of the Year at the British Book Awards for the third time in six years in 2020.