Question: Assassination Vacation is a book by which American author, journalist, essayist, social commentator and actress, published in 2005, in which she travels around the United States researching the assassinations of U.S. Presidents?
Context: Robert J. Groden (born November 22, 1945) is an American author who has written extensively about conspiracy theories regarding the assassination of U.S. President John F. Kennedy.  His books include "The Killing of a President: The Complete Photographic Record of the JFK Assassination, the Conspiracy, and the Cover-up"; "The Search for Lee Harvey Oswald: A Comprehensive Photographic Record"; and "JFK: The Case for Conspiracy" (shorter version than his 1975 co-authored book).  Groden is a photo-optics technician who served as a photographic consultant for the House Select Committee on Assassinations. Assassination Vacation is a book by Sarah Vowell, published in 2005, in which she travels around the United States researching the assassinations of U.S. Presidents Abraham Lincoln, James A. Garfield, William McKinley.  While most of the book is devoted to facts about the assassinated presidents and the men who would murder them, Vowell intersperses the book with anecdotes of her adventures on her self-proclaimed "pilgrimage" of presidential assassination. Andrew Bard Schmookler (born 1946) is an award-winning American author, public speaker, social commentator, and radio talk show host.  He was the nominee of the Democratic Party for U.S. Representative for Virginia's 6th congressional district during the 2012 general election. Bill Bishop (born November 28, 1953) is an American author, journalist and social commentator.  He co-wrote a book with retired college professor Robert Cushing entitled "The Big Sort: Why the Clustering of Like-Minded America is Tearing Us Apart".  His ideas have influenced the speeches of former U.S. President Bill Clinton. The Spirit of the Age (full title "The Spirit of the Age: Or, Contemporary Portraits") is a collection of character sketches by the early 19th century English essayist, literary critic, and social commentator William Hazlitt, portraying 25 men, mostly British, whom he believed to represent significant trends in the thought, literature, and politics of his time.  The subjects include thinkers, social reformers, politicians, poets, essayists, and novelists, many of whom Hazlitt was personally acquainted with or had encountered.  Originally appearing in English periodicals, mostly "The New Monthly Magazine" in 1824, the essays were collected with several others written for the purpose and published in book form in 1825. Jerome Cabeen (born July 18, 1967) is an author, speaker, social justice advocate and missionary originally from Houston, Texas (US).  He is the author of Amazon.com bestseller, "Memoirs of a Reluctant Servant –Two Years of Triumph and Sorrow in Liberia, Africa".  The book reached #1 on the Amazon.com Bestseller List in the Coastal West Africa category.  Cabeen lived in Honduras, Central America, from 2004 to 2008 and Liberia, West Africa, from 2008 to 2010, volunteering as a missionary for Franciscan Works, a Catholic missionary organization in Chicago, Illinois.  Currently he resides in Beaumont, Texas and works for the Catholic Diocese of Beaumont.  He is a practicing Catholic and travels around the United States giving talks and lectures on Liberia, Honduras, social justice teachings and missionary work. a Russian painter, writer, essayist and social commentator of an openly philosophical turn, and, as he once said, "one profession proceeds from the other".  He shares his time between working in Moscow, London and Berlin.  In 2015 began his work in the United States. William Hazlitt (18 April 1737 – 16 July 1820) was a Unitarian minister and author, and the father of the Romantic essayist and social commentator of the same name.  He was an important figure in eighteenth-century English and American Unitarianism, and had a major influence on his son's work. Mama Mirabelle's Home Movies is a British animated television series.  Set in the African savanna, it focuses on an enthusiastic elephant named Mama Mirabelle, who travels around the world to film real wildlife footage and project them onto a screen of fireflies in front of almost the entire animal kingdom.  The "Home Movies" are used for educational purposes not only for the principal young characters but for the target audience at home.  It is animated using the same computer software as "Peppa Pig".  The live action footage comes from the BBC Natural History Unit archives, as well as the National Geographic Society, and is also shown in the United States on PBS.  In the American version, all of the animals except Karla have American voices.  Vanessa Williams is the voice of Mama Mirabelle in the US, and Floella Benjamin is the voice for Mama Mirabelle in the UK.  The series is produced by UK animation company King Rollo Films, whose other shows include "Disney's The Adventures of Spot", "Paz", "Maisy", "The Extraordinary Adventures of Poppy Cat" and "Mr. Benn".  "Mama Mirabelle's Home Movies" season 1 runs as 52 11-minute shows on CBeebies, but the show is running on PBS Kids as of 2008 in a thirty-minute slot by combining two ten-minute shows with extra songs, features, and games.  Music for this show is written by Lester Barnes, the composer for "Horrid Henry", "Me Too! ", "Paz", and "Urmel".)  The series was created by Douglas Wood, who is also the author of the companion children's picture book "When Mama Mirabelle Comes Home", published by National Geographic Channel Book. Sarah Jane Vowell (born December 27, 1969) is an American author, journalist, essayist, social commentator and actress.  Often referred to as a "social observer," Vowell has written seven nonfiction books on American history and culture.  She was a contributing editor for the radio program "This American Life" on Public Radio International from 1996 to 2008, where she produced numerous commentaries and documentaries and toured the country in many of the program's live shows.  She was also the voice of Violet in the animated film "The Incredibles".
Answer: Sarah Vowell