Question: Which writer, P. C. Wren or Louis L'Amour, wrote books consisted primarily of Western novels?

Context paragraphs:
Yondering: Yondering is a collection of short stories by American author Louis L'Amour, published in 1980.  A departure from L'Amour's traditional subject matter of the Old West, "Yondering" contains a mix of adventure stories and character studies, primarily set in the first half of the 20th century.  Two of them are set during the World War II era, with many of the stories drawing upon the author's own life experiences.  The book's publication celebrated the milestone of L'Amour having an estimated 100 million books in print at that time of publication.

Hondo (film): Hondo is a 1953 Warnercolor 3D Western film directed by John Farrow and starring John Wayne and Geraldine Page.  The screenplay is based on the July 5, 1952 Collier's short story "The Gift of Cochise" by Louis L'Amour.  The book "Hondo" was a novelization of the film also written by L'Amour, and published by Gold Medal Books in 1953.  The supporting cast features Ward Bond, James Arness and Leo Gordon.

Haunted Mesa: Haunted Mesa is a science fiction novel by Louis L'Amour, set in the American Southwest amidst the ruins of the Anasazi.  L'Amour attempts, as in others of his works, to suggest a reasonable explanation for the phenomena attributed to The Bermuda Triangle, i.e., portals between worlds or different facets of this world.  The same phenomenon is used, albeit in a very minor way, in his novel "The Californios."  A useful contrast between the two novels is that in "The Haunted Mesa," the Anasazi leadership, who rule both the portals and their people with an iron hand (the Hand and the Voice are two of the leaders), are corrupt and thoroughly evil, whereas the person or people who know about the portal in "The Californios" are reserved and rather helpful to people they respect.  These were different portals however, and did not necessarily lead to the same location.

Last of the Breed: Last of the Breed, a 1987 book by Louis L'Amour, tells the fictional story of Native American United States Air Force pilot Major Joseph Makatozi (Joe Mack), shot down by the Soviets over the ocean between Russia and Alaska and then captured.  Although the exact time is never stated, it appears to be the mid- to late 1980s, as Mikhail Gorbachev's rise to power is mentioned.  It was L'Amour's second-to-last published novel.

P. C. Wren: Percival Christopher Wren (1 November 187522 November 1941) was an English writer, mostly of adventure fiction.  He is remembered best for "Beau Geste", a much-filmed book of 1924, involving the French Foreign Legion in North Africa.  This was one of 33 novels and short story collections that he wrote, mostly dealing with colonial soldiering in Africa.

Kip Morgan: Kipling Morgan, better known as Kip Morgan was a fictional character created by the bestselling author Louis L'Amour.  Morgan is a detective, like the hard-boiled detective characters created by Dashiell Hammett and Raymond Chandler.  In L'Amour's words, "Kip Morgan is an ex-prizefighter struggling to make a new career himself as a private operator."  L'Amour wrote a few short stories featuring Morgan including "Dead Man's Trail", "With Death in His Corner" and "The Street of Lost Corpses".  Several of the stories make up the latter third of Vol.  6 of "The Collected Short Stories of Louis L'Amour".

Columbia Publications: Columbia Publications was an American publisher of pulp magazines featuring the genres of science fiction, westerns, detective stories, romance, and sports fiction.  The company published such writers as Isaac Asimov, Louis L'Amour, Arthur C. Clarke, Randall Garrett, Edward D. Hoch, and William Tenn.  Operating from the mid-1930s to 1960, Columbia's most notable magazines were the science fiction pulps "Future Science Fiction", "Science Fiction", and "Science Fiction Quarterly".  Other long-running titles included "Double Action Western Magazine" (1934–1960), "Real Western" (1935–1960), "Western Action" (1936–1960), "Famous Western" (1937–1960), "Today's Love Stories" (1938–1959), and "Super Sports" (1939–1957).  In addition to pulp magazines, the company also published some paperback novels, primarily in the science fiction genre.

Sackett: The Sackett family is a fictional American family featured in a number of western novels, short stories and historical novels by American writer Louis L'Amour.

Zola Helen Ross: Zola Helen Ross (May 9, 1912 – November 20, 1989) (née Girdey) was a Pacific Northwest writer.  She also taught writing and co-founded the Pacific Northwest Writers Association with Lucile Saunders McDonald of "The Seattle Times".  She wrote in various genres, including adventure, children's fiction, crime, mystery, and suspense.  She was also the author of several Western historical novels; her male counterpart was Louis L'Amour.  The Pacific Northwest and the Great Basin are the settings for her stories, and they include the towns of Reno, San Francisco, and Seattle.  Ross occasionally wrote under the pseudonyms Helen Arre and Bert Iles.  She taught writing at the University of Washington and the Lake Washington schools in Kirkland, Washington.  She was married to William Frank Ross, and lived in Seattle, Washington.

Louis L'Amour: Louis Dearborn L'Amour ( ; March 22 1908 –June 10 1988) was an American novelist and short story writer.  His books consisted primarily of Western novels (though he called his work 'frontier stories'); however, he also wrote historical fiction ("The Walking Drum"), science fiction ("The Haunted Mesa"), non-fiction ("Frontier"), as well as poetry and short-story collections.  Many of his stories were made into films and John Wayne once made the dubious assertion that L'Amour was the most interesting man in the world.  L'Amour's books remain popular and most have gone through multiple printings.  At the time of his death almost all of his 105 existing works (89 novels, 14 short-story collections, and two full-length works of nonfiction) were still in print, and he was considered "one of the world's most popular writers".

Supporting paragraphs: P. C. Wren Louis L'Amour
Answer: Louis Dearborn L'Amour