A Web of Air is a young adult post-apocalyptic science fiction novel by Philip Reeve.
 The sequel to "Fever Crumb", it is the second book in the Mortal Engines Quartet prequel series.
 It was published in April 2010.
Archibald Campbell or Arthur Campbell (1805–1874) of the Bengal Medical Service (the Indian Medical Service according to some sources) was the first superintendent of the sanitarium town of Darjeeling in north east India.
 Sources differ regarding his first name.
 While some say that the "A" in "Dr A. Campbell" stands for Arthur, the name register of the Darwin Correspondence Online Database gives his name as Archibald, supported by Teagenius.com.
 However, in the same database, the footnote of a letter from Darwin to Sir Joseph Hooker cites his name as Andrew.
 Family papers and census returns refer to his first name as Archibald.
 He is also referred to as the first superintendent of Darjeeling.
 He was transferred from Kathmandu to Darjeeling in 1839.
Montgomery or Montgomerie is a surname from a place name in Normandy.
 Although there are many stories of its origin, an old theory explains that the name is a corruption of "Gomer's Mount" or "Gomer's Hill" (Latin: "Mons Gomeris"), any of a number of hills in Europe named in attribution to the biblical patriarch Gomer, but it does not explain the final "-y" or "-ie" (the phonetical evolution would have been "*Montgomers") and it does not correspond to the old mentions of the place name Montgommery in Normandie : "Monte Gomeri" in 1032–1035, "de Monte Gomerico" in 1040 and "de Monte Gumbri" in 1046–1048.
 More relevant is the explanation by the Germanic first name "Gumarik", a compound of "guma" "man" (see bridegroom) and "rik" "powerful", that regularly gives the final "-ry" ("-ri") in the French first names and surnames (Thierry, Amaury, Henry, etc.).
 Moreover, the name is still used as a surname in France as "Gommery", from the older first name "Gomeri".
Gomery is a rare surname found mainly in the United Kingdom, France and North America.
 In some cases Gomery has arisen by a process of aphaeresis, where the "Mont-" has gradually been lost from the surname Montgomery, a place name in Normandy.
 This place name is already associated with the first name Gomery and means "Gomery's hill".
 Gomery was the name of the owner, originally "Gumaric", Germanic personal name, that is a compound of two elements: "guma" "man" (Old English "guma"; "brȳdeguma" > bridegroom; German: "Bräutigam") and "ric" "power" (Old English "rīc" in "bishopric").
 This Germanic name still survives today in the German first name Gumarich.
A Grief Observed is a collection of C. S. Lewis's reflections on the experience of bereavement following the death of his wife, Joy Davidman, in 1960.
 The book was first published in 1961 under the pseudonym N.W. Clerk as Lewis wished to avoid identification as the author.
 Though republished in 1963 after his death under his own name, the text still refers to his wife as “H” (her first name, which she rarely used, was Helen).
Verity ("alias" Veretie, Verety, Verita, Veritie, etc.) is a female first name and a surname.
 As a first name it derives from the Latin feminine noun "veritas", meaning "truth".
 It is thus an equivalent of Alethea, a female first name first used in England "circa" 1585, derived from the ancient and modern Greek feminine noun "αλήθεια" (pronounced "al-ee-thia"), meaning "truth".
 It was adopted in England as a Puritan virtue name, truthfulness being considered as a desirable attribute especially in a female.
 Verity was one of the most popular first names given to girls in Australia.
 It is especially associated with parts of Yorkshire and Northern England.
 Verity is also a surname, which may have more ancient unrelated origins, possibly being a corruption of a similar word.
 Notable people with the name include:
Hermes Phettberg (born October 5, 1952, as Josef Fenz) is an Austrian artist, comedian, actor, author and talk show host.
 The first name of his nom de plume is taken from the ancient Greek god Hermes.
 The last name means "fat mountain", but is written as "Phettberg" instead of "Fettberg" as an ironic hint to his Greek-sounding first name.
Citizen Khan is a family-based British sitcom produced by the BBC and created by Adil Ray.
 Five series have been shown so far.
 It is set in Sparkhill, East Birmingham, described by its lead character, a Pakistani Muslim Mr Khan (Adil Ray), as "the capital of British Pakistan".
 "Citizen Khan" follows the trials and tribulations of Mr Khan, a loud-mouthed, patriarchal, cricket-loving, self-appointed community leader, and his long suffering wife (played by Shobu Kapoor) and daughters Shazia (Maya Sondhi 2012–2014, Krupa Pattani 2015–) and Alia (Bhavna Limbachia).
 In Series One, Kris Marshall starred as Dave, the manager of Mr Khan's local mosque.
 The first name of Mrs Khan is Razia, however Mr Khan's first name is never revealed.
Philip Reeve (born 28 February 1966) is a British author and illustrator of children's books.
 He currently lives on Dartmoor with his wife Sarah and their son Sam.
Jonas is a common male name in many Western world countries.
 It is primarily used as a first name, but also occurs as a surname.
 It is particularly rare in Israel, Germany, and, the Netherlands.
 It is also the most common name in Lithuania, however, in Lithuania, the name Jonas is derived from the Hebrew Yohanan as opposed to Jonah.
 Its widespread use and popularity has roots in its Jewish and Christian origins.
 As a surname, it is often Jewish, whilst as a first name it is mostly used in countries where Christianity is the main religion.
 In Turkish, Arabic and the Muslim world the equivalent name is Yunus (یونس) or Younes.
 In North America the name found popularity among Métis and Aboriginals in the Northwest.

Question: What is the first name of the wife of the author of "A Web of Air"?
Answer: Sarah