John Grisham writes legal thrillers, mysteries, and variations on these themes. He's also penned a true-crime novel titled The Innocent Man: Murder and Injustice in a Small Town and has a young adult series featuring the character and book title of Theodore Boone: Kid Lawyer.
John Grisham has also written novels that, while still falling into the thriller books genre, take a different approach to the genre. One of his more recent titles, Sooley, departs from the law-firm-centric plots and lawyer main characters and follows a teenager traveling from South Sudan to the United States to play in a basketball tournament.
However, despite the departure from his normal theme, there's no denying the fact that Grisham brings his signature style to the story.