Question: Traction City is a novella by which British author?

Context articles: Fever Crumb Series
The House of Susan Lulham
Philip Reeve
Missile Gap
Coraline
Nightshades: Thirteen Journeys Into Shadow
This Census-Taker
The Thief (novella)
Mixed Magics
Traction City (novella)

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.
The House of Susan Lulham (2014) is a crime/ghost story novella by British author Phil Rickman, what he describes as the "12 and a half" entry in his Merrily Watkins series, about a female vicar and diocesan exorcist for the cathedral city of Hereford.
 The Watkins stories combine supernatural and mystery elements, leading them to be classified variously as horror and crime fiction (though Rickman personally rejects the label of horror writer).
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.
"Missile Gap" is a 2006 English language science fiction novella, originally published in the anthology "One Million A.D." by British author Charles Stross.
 It won the Locus Award for best novella of 2006.
 The novella was republished in Stross's short-story collection "Wireless" in 2009.
Coraline is a dark fantasy children's novella by British author Neil Gaiman, published in 2002 by Bloomsbury and Harper Collins.
 It was awarded the 2003 Hugo Award for Best Novella, the 2003 Nebula Award for Best Novella, and the 2002 Bram Stoker Award for Best Work for Young Readers.
 It has been compared to Lewis Carroll's "Alice's Adventures in Wonderland" and was adapted into a 2009 stop-motion film directed by Henry Selick.
Nightshades: Thirteen Journeys Into Shadow is a dark fantasy/horror short story compilation by British author Tanith Lee.
 It contains a long novella, which was the only previously unpublished story included, and 12 short stories.
 Each story in this book is preceded by a brief introductory note by the author.
This Census-Taker is a fantasy novella by British author China Miéville.
 It was first published by Pan MacMillan in 2016.
The Thief is a 2006 novella by British author Ruth Rendell, published in the Quick Reads series.
 As an entry in said series, it is of novella length.
Mixed Magics: Four Tales of Chrestomanci is a collection of four fantasy stories by the British author Diana Wynne Jones, first published by Collins in 2000.
 One was original to the collection, "Stealer of Souls", a novella about half of the book in length; three had been published in the 1980s.
 It was the fifth book published among seven Chrestomanci books (1977 to 2006) and the only collection in the series.
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.