Question: The Emerald Wand of Oz was published by the comapny that is headquartered in what city?

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Jellia Jamb: Jellia Jamb is a fictional character from the classic children's series of Oz books by American author L. Frank Baum.  She is first introduced in "The Wonderful Wizard of Oz" (1900), as the head maid who works in the royal palace of the Emerald City which is the imperial capital of the Land of Oz.  In later books, Jellia eventually becomes Princess Ozma's favorite servant out of the Emerald City's staff administration.  She is also the protagonist of Ruth Plumly Thompson's novel "Ozoplaning with the Wizard of Oz".

The Emerald Wand of Oz: The Emerald Wand of Oz is a 2005 book by Sherwood Smith and is a continuation of the Oz series that was started by L. Frank Baum in 1900 and continued by his many successors.  The book is illustrated by William Stout and published by Harper Collins.

Emerald City: The Emerald City (sometimes called the City of Emeralds) is the capital city of the fictional Land of Oz in L. Frank Baum's Oz books, first described in "The Wonderful Wizard of Oz" (1900).

Emerald City Confidential: Emerald City Confidential is a 2009 computer adventure game conceived by Dave Gilbert, developed by Wadjet Eye Games and published through PlayFirst.  It follows the protagonist Petra, Emerald City's only private eye, as she is approached by a strange woman named Dee Gale.  Dee's fiancé is missing, and she is willing to pay Petra above the going rate in order to find him.  Lacking any other prospects, Petra agrees.  What starts off as a simple missing person case soon takes Petra deep into the seedy underbelly of the Emerald City's criminal underground and beyond.  She encounters many characters from the Oz canon and some new characters, learns several magic spells, and uncovers the answer to a dark secret that has haunted Petra all her life.

Trouble Under Oz: Trouble Under Oz is a 2006 novel by Sherwood Smith, illustrated by William Stout and published by Harper Collins.  It is a sequel to Smith's 2005 novel "The Emerald Wand of Oz" which is a further continuation of the Oz series originally started by L. Frank Baum in 1900.

HarperCollins: HarperCollins Publishers LLC is one of the world's largest publishing companies and is one of the "Big Five" English-language publishing companies, alongside Hachette, Macmillan, Penguin Random House, and Simon & Schuster.  The company is headquartered in New York City and is a subsidiary of News Corp.  The company name is a combination of several publishing firm names: Harper & Row, an American publishing company acquired in 1987, whose own name was the result of an earlier merger of Harper & Brothers (founded 1817) and Row, Peterson & Company; together with UK publishing company William Collins, Sons (founded 1819), acquired in 1990.

Dorothy and the Wizard in Oz: Dorothy and the Wizard in Oz is the fourth book set in the Land of Oz written by L. Frank Baum and illustrated by John R. Neill.  It was published on June 18, 1908 and reunites Dorothy with the humbug Wizard from "The Wonderful Wizard of Oz" (1900).  This is one of only two of the original fourteen Oz books (the other being "The Emerald City of Oz" (1910), to be illustrated with watercolor paintings.

Emerald City (TV series): Emerald City is an American fantasy television series developed for NBC by Matthew Arnold and Josh Friedman, and based on the Oz book series written by L. Frank Baum, set in the fictional Land of Oz.  Directed by Tarsem Singh and starring Adria Arjona, Oliver Jackson-Cohen, Ana Ularu and Vincent D'Onofrio, "Emerald City" received a 10-episode order by NBC in April 2015, which premiered on January 6, 2017, with a two-episode debut, and concluded on March 3, 2017.  On May 5, 2017, NBC canceled the series after one season.

The Emerald City of Oz: The Emerald City of Oz is the sixth of L. Frank Baum's fourteen Land of Oz books.  It was also adapted into a Canadian animated film in 1987.  Originally published on July 20, 1910, it is the story of Dorothy Gale and her Uncle Henry and Aunt Em coming to live in Oz permanently.  While they are toured through the Quadling Country, the Nome King is assembling allies for an invasion of Oz.  This is the first time in the Oz series that Baum made use of double plots for one of the books.

Emerald City (song): "Emerald City" is a 1967 song by The Seekers about a visit to the fictional Emerald City from L. Frank Baum's Oz books.  Set to the tune of "Ode to Joy" from Beethoven's Ninth Symphony, "Emerald City" reached #49 on the UK Charts in 1967.

Supporting paragraphs: The Emerald Wand of Oz HarperCollins
Answer: New York City