Author Lee Child is most associated with which of these genres?

James D. "Jim" Grant (born 29 October 1954), primarily known by his pen name Lee Child, is a British author who writes fictional crime thriller novels. His books follow the adventures of a former American military policeman, Jack Reacher, who wanders the United States. His first novel, Killing Floor, won both the Anthony Award, and the Barry Award for Best First Novel.

After being made redundant from his job due to corporate restructuring, Grant decided to start writing novels, stating they are "the purest form of entertainment." In 1997, his first novel, Killing Floor, was published, and he moved to the United States in the summer of 1998.

His pen name "Lee" comes from a family joke about a heard mispronunciation of the name of Renault's Le Car, as 'Lee Car'. Calling anything 'Lee' became a family gag, his daughter, Ruth, was 'lee child'.

Happily for Grant, 'Child' places his books alphabetically on bookstore and library shelves between crime fiction greats Raymond Chandler and Agatha Christie.

Grant has said that he chose the name Reacher for the central character in his novels because he himself is tall and when they were grocery shopping his wife Jane remarked: "'Hey, if this writing thing doesn't pan out, you could always be a reacher in a supermarket.' ... 'I thought, Reacher — good name.'"