Question: An english author born in 1973 wrote a series of young adult books called Diary of a Chav. How many books are in the series?

Context articles: Roderick Townley
Will Hobbs
Diary of a Chav
Tanya Landman
Amber House Trilogy
Margaret Mahy
Caitlin Kittredge
Tom Clancy's Net Force
Grace Dent
Bass Ackwards and Belly Up

Roderick Townley (born June 7, 1942) is an American author of juvenile, young adult, and adult books, including books of poetry, nonfiction, and literary criticism.
 He received his Ph.D. from Rutgers University, New Brunswick, and was for many years a poet and fiction writer, and for a time lived in New York City and wrote for TV Guide, The Village Voice and other publications.
 In 2001, he began the Sylvie Cycle, a metafictional series about the spunky, fictional Princess Sylvie who lives her life in a book.
Will Hobbs is the author of nineteen novels for upper elementary, middle school and young adult readers, as well as two picture book stories.
 Hobbs credits his sense of audience to his fourteen years of teaching reading and English in southwest Colorado.
 When he turned to writing, he set his stories mostly in wild places he knew from firsthand experience.
 Hobbs has said he wants to “take young people into the outdoors and engage their sense of wonder.”
 "Bearstone", his second novel, gained national attention when it took the place of "Where the Red Fern Grows" as the unabridged novel in Prentice-Hall’s 7th grade literature anthology.
 "Downriver" and "Far North" were selected by the American Library Association for its list of the 100 Best Young Adult Books of the 20th century.
 As of 2016, all twenty-one of Hobbs’ books are in print, and all the novels are available in unabridged audio editions.
Diary of a Chav is a young adult series that was written by the English journalist, author, and broadcaster Grace Dent.
 The series consists of six books that were originally released in the United Kingdom from 2007 to 2009.
 An attempt to publish the books overseas in the United States was largely unsuccessful and only the first two books, re-titled for American publication, were released.
Tanya Landman is an English author of children's and young adult books.
 She is also a performer and scriptwriter for Storybox Theatre, a puppet theatre based in Devon, England.
The Amber House Trilogy is a series of young adult books by American author Kelly Moore and her daughters Tucker Reed and Larkin Reed.
 The first book in the series, "Amber House", was published on October 1, 2012 through Arthur A. Levine Books. "
Amber House" has been licensed in South America and Europe.
 It was a featured title in the 2012 Scholastic Book Fair.
 Its sequel, "Neverwas", was released on January 7, 2014.
 Official publication dates for a third installment in the series, "Ever Shall", and a fourth and final installment, "Otherwhen", have not been announced as of early 2017.
Margaret Mahy, ONZ (21 March 1936 – 23 July 2012) was a New Zealand author of children's and young adult books.
 Many of her story plots have strong supernatural elements but her writing concentrates on the themes of human relationships and growing up.
 She wrote more than 100 picture books, 40 novels and 20 collections of short stories.
 At her death she was one of thirty writers to win the biennial, international Hans Christian Andersen Medal for her "lasting contribution to children's literature".
Caitlin Kittredge (born September 1984) is an American author of dark fantasy and urban fantasy noir.
 She is known for her "Nocturne City" series of adult novels, and for "The Iron Codex", a series of young adult books.
Tom Clancy's Net Force is a novel series, created by Tom Clancy and Steve Pieczenik and originally written by Steve Perry.
 The original series ceased publication in 2006.
 Relaunched in 2013, and currently written by veteran Tom Clancy author Jerome Preisler, it is set in 2018 and charts the actions of Net Force: a special executive branch of the United States government set up to combat increasing crime and terrorist activity on the Internet.
 There was also a spin-off of young adult books called "Net Force Explorers".
Grace Dent (born 3 October 1973) is an English journalist, author and broadcaster.
 Dent chiefly writes for "The Independent", with an opinion column on Wednesday and a television column every Saturday.
 She writes "Grace and Flavour", a restaurant critic for the "London Evening Standard" and contributes to magazines such as "Tatler" and "Marie Claire".
Bass Ackwards and Belly Up is a young adult novel by Elizabeth Craft and Sarah Fain, published by Little, Brown in May 2006.
 The novel is the first by Craft and Fain, better known as writers and co-producers for the television show "The Shield".
 They shared the writing duties with Craft writing the characters of Harper and Sophie and Fain writing the characters of Kate and Becca.
 The novel was nominated for a Borders Original Voices Award in 2006, in the Intermediate/Young Adult Books category.