What tetralogy was written by Philip Reeve that is a sequel of a series about a woman named Fever Crumb?
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". Fever Crumb Series:  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. 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).
Mortal Engines Quartet