Question: The Golden Age of Murder is a book written by a British crime novelist, critic and what?

Context paragraphs:
Swimming Pool (film): Swimming Pool is a 2003 French-British erotic thriller film directed by François Ozon and starring Charlotte Rampling and Ludivine Sagnier.  The plot focuses on a British crime novelist, Sarah Morton, who travels to her publisher's upmarket summer house in Southern France to seek solitude in order to work on her next book.  However, the arrival of Julie, who claims to be the publisher's daughter, induces complications and a subsequent crime.

One Jump Ahead (film): One Jump Ahead is a 1955 British crime film directed by Charles Saunders and starring Paul Carpenter, Diane Hart, Jill Adams and Freddie Mills.  The film was based on a novel by American crime novelist Robert H. Chapman.  The screenplay concerns a journalist who helps police track down the killer of a female blackmailer.The title refers to the reporter's attempts to keep "one jump ahead" of the police in solving the crime.

Rebecca Tope: Rebecca Tope is a British crime novelist and journalist.  She is the author of three murder mystery series, featuring the fictional characters of Den Cooper, a Devon police detective, Drew Slocombe, a former nurse, now an undertaker, Thea Osborne, a house sitter in the Cotswolds, and Persimmon Brown, a florist in the Lake District.  Tope is also ghost writer of the novels based on the ITV series "Rosemary and Thyme".

John Wainwright (author): John William Wainwright (25 February 1921 – September 1995), was a British crime novelist and author of 83 books, four of which have been published under the pen name Jack Ripley.  He also wrote some short stories (mostly uncollected in book format), 7 radio plays, and an indefinite amount of magazine articles and newspaper columns.

Elly Griffiths: Elly Griffiths is the pen name of Domenica de Rosa (born 17 august 1963, London), a British crime novelist.  She has written two series as Griffiths to date, one featuring Ruth Galloway, the other featuring Detective Inspector Edgar Stephens and Max Mephisto.

Hartley Howard: Hartley Howard (1908–1979) was a pen name of Leopold Horace Ognall, a British crime novelist.  Ognall was born in Montreal and worked as a journalist before starting his fiction career.  He wrote over ninety novels before his death in 1979.  The private eye Glenn Bowman was one of his most successful characters.  As Harry Carmichael, Ognall's primary series characters were John Piper (an insurance assessor) and "Quinn," a crime reporter.

Agatha Christie's Marple: Agatha Christie's Marple (or simply Marple) is a British ITV television series loosely based on the books and short stories by British crime novelist Agatha Christie.  The title character was played by Geraldine McEwan from the first to third series, until her retirement from the role, and by Julia McKenzie from the fourth series onwards.

Martin Edwards (author): Martin Edwards (born 7 July 1955), whose full name is Kenneth Martin Edwards, is a British crime novelist, critic and solicitor.

Solution by Phone: Solution by Phone is a 1954 British crime film directed by Alfred Travers and starring Clifford Evans, Thea Gregory and Georgina Cookson.  An actor seeks help from a crime novelist in his attempts to dispose of a body.

The Golden Age of Murder: The Golden Age of Murder is a book written by Martin Edwards and published by HarperCollins on 7 May 2015 which later went on to win the Edgar Award for Best Critical / Biographical Work in 2016.

Supporting paragraphs: The Golden Age of Murder Martin Edwards (author)
Answer: solicitor