Question: What tetralogy was written by Philip Reeve that is a sequel of a series about a woman named Fever Crumb?
Context: Starcross, or the Coming of the Moobs!  or Our Adventures in the Fourth Dimension!  is a young adult novel by Philip Reeve, released in October 2007.  Illustrated by David Wyatt, it is the second book in the "Larklight" trilogy, sequel to the 2006 novel "Larklight". 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. Here Lies Arthur is a young-adult novel by Philip Reeve, published by Scholastic in 2007.  Set in fifth or sixth century Britain and the Anglo-Saxon invasion, it features a girl who participates in the deliberate construction of legendary King Arthur during the man's lifetime, orchestrated by a bard.  Reeve calls it a back-creation: not a genuine historical novel as it is not based on actual specific events; rather it is "back-created" from the legends, giving them a "realistic" origin. 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. A Darkling Plain is the fourth and final novel in the "Mortal Engines Quartet" series written by author Philip Reeve. Mothstorm, or the Horror from Beyond Uranus Georgium Sidus!  or a Tale of Two Shapers is a young adult novel by Philip Reeve, released in October 2008.  Illustrated by David Wyatt, it is the third book in the Larklight Trilogy, sequel to the 2007 novel "Starcross". 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. Buster Bayliss is a series of books written by British author Philip Reeve, intended for younger readers.  The main character of the series is Buster Bayliss.  In the stories, Buster must stop someone or something taking over the world.  The catchphrase which often appears on the cover of the books is "where's there's trouble, there's Buster Bayliss".  So far there are four books. Murderous Maths is a series of British educational books by author Kjartan Poskitt.  Most of the books in the series are illustrated by illustrator and author Philip Reeve, with the exception of "The Secret Life of Codes", which is illustrated by Ian Baker, "The Essential Arithmetricks: How to plus, minus, times and divide."  illustrated by Daniel Postgate and Rob Davis, and "The Murderous Maths of Everything", also illustrated by Rob Davis. 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.
Answer: Mortal Engines Quartet