Question: What is the first book in the prequel series to the four books referred to also as the Predator Cities Quartet by Philip Reeve?

full_context: Document 1: Traction City (novella): Traction City is a novella by Philip Reeve and is a prequel to the Mortal Engines Quartet it was released as a flip book alongside Chris Priestlys' teachers tales of terror for World Book Day.
Document 2: Fever Crumb: Fever Crumb is a young adult post-apocalyptic science fiction novel by Philip Reeve, published in 2009. Sequels called "A Web of Air" (2010) and "Scrivener's Moon" (2011) follow. The books of the Fever Crumb Series are prequels to the Mortal Engines Quartet series of novels by the same author.
Document 3: Fever Crumb Series: The Fever Crumb Series is the title of a series of novels written by British author, Philip Reeve, and is the prequel series to his critically acclaimed "Mortal Engines Quartet". As of 2015 the series consists of three books: "Fever Crumb" (2009), "A Web of Air" (2010), and "Scrivener's Moon" (2011). The books follow a young woman known as Fever Crumb, and her adventures set around the time of the creation of the first traction cities that become so prevalent in the Mortal Engines series. Reeve stated in 2011 that he had always envisaged a quartet for the series, assuring readers of a fourth installment.
Document 4: John Twelve Hawks: John Twelve Hawks (pseudonym) is the author of the 2005 dystopian novel "The Traveler" and its sequels, "The Dark River" and "The Golden City", collectively comprising the Fourth Realm Trilogy. The trilogy has been translated into 25 languages and has sold more than 1.5 million books. The trilogy was followed five years later by a fourth book, "Spark", and a non-fiction eBook, "Against Authority." "John Twelve Hawks" is a pseudonym and his real identity is unknown.
Document 5: A Web of Air: 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.
Document 6: Predator's Gold: Predator's Gold is the second of four novels in Philip Reeve's series for young adults, the "Mortal Engines Quartet".
Document 7: Mortal Engines (film): Mortal Engines is an upcoming New Zealand-American science fiction action adventure film directed by Christian Rivers and written by Peter Jackson, Fran Walsh, and Philippa Boyens. It is based on the novel of the same name by Philip Reeve. It stars Robert Sheehan, Hera Hilmar, Hugo Weaving, Jihae, Leila George, Ronan Raftery, and Stephen Lang. It is set to be released in theaters on December 14, 2018.
Document 8: Pyat Quartet: Pyat Quartet is a tetralogy of novels (1981–2006) by Michael Moorcock comprising "Byzantium Endures", "The Laughter of Carthage", "Jerusalem Commands" and "The Vengeance of Rome".
Document 9: The Giver Quartet: The Giver Quartet is a series of four young adult novels by Lois Lowry. The quartet consists of "The Giver" (1993), "Gathering Blue" (2000), "Messenger" (2004) and "Son" (2012). The first book won the 1994 Newbery Medal and has sold more than 10 million copies. The story takes place in the world of the Giver. Each book has a different protagonist, but is set in the same futuristic era.
Document 10: Infernal Devices (Philip Reeve novel): Infernal Devices is the third of four novels in Philip Reeve's children's series, the "Mortal Engines Quartet".
Document 11: Mortal Engines: Mortal Engines is the first of four novels in Philip Reeve's quartet of the same name. The book focuses on a futuristic, steampunk version of London, now a giant machine striving to survive on a world running out of resources. The book has won a Nestlé Smarties Book Prize and was shortlisted for the 2002 Whitbread Award.
Document 12: Mortal Engines Quartet: The Mortal Engines Quartet is a tetralogy consisting of four novels written by the British author Philip Reeve: "Mortal Engines" (2001), "Predator's Gold" (2003), "Infernal Devices" (2005), and "A Darkling Plain" (2006). It has also been referred to as the Predator Cities Quartet or the Hungry City Chronicles, although the author has objected to those names.
Document 13: Doom novels: The "Doom" novel series is a series of four near-future science fiction novels co-written by Dafydd ab Hugh and Brad Linaweaver; "Knee-Deep in the Dead", "Hell on Earth", "Infernal Sky", and "Endgame". The series is initially based on the "Doom" and "" first-person shooter video games created by Id Software, although there are multiple departures from the game in the first two novels, and the second two continue in an independent direction to the games' storylines. The novels are primarily written from the first-person perspective of Flynn Taggart, a corporal assigned to Fox Company of United States Marine Corps, although the perspective changes from character to character in the second and third novel.
Document 14: A Darkling Plain: A Darkling Plain is the fourth and final novel in the "Mortal Engines Quartet" series written by author Philip Reeve.
Document 15: Philip Reeve: 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.
ground_truth: Fever Crumb