Question: What kind of scholar were American writers Stephen E. Ambrose and Will Durant? 

Context articles: Band of Brothers (book)
China Marine (memoir)
Sleeping Beauties (novel)
Native Writers' Circle of the Americas
Stephen E. Ambrose
Halleck: Lincoln's Chief of Staff
Black House (novel)
John McGrath (soldier)
Will Durant
Hugh Ambrose

Band of Brothers, subtitled, "E Company, 506th Regiment, 101st Airborne: From Normandy to Hitler's Eagle's Nest", by Stephen E. Ambrose is an examination of a parachute infantry company in the 101st Airborne Division in the European Theater during World War II.
 While the book treats the flow of battle, it concentrates on the lives of the soldiers in and associated with the company.
China Marine: An Infantryman's Life after World War II is the second memoir written by United States Marine Corporal Eugene B. Sledge, published posthumously with foreword by Stephen E. Ambrose, without subtitle, on May 10, 2002 by University of Alabama Press It was republished in paperback with the full title by Oxford University Press in July 2003.
 This book is the sequel to his first, better known, memoir, "With the Old Breed: At Peleliu and Okinawa" and Ambrose identifies it as the only account of the Marines stationed in postwar China.
 It has recently achieved wider public recognition as credited source material for the 2010 HBO miniseries "The Pacific".
Sleeping Beauties is a novel by American writers Stephen King and his son Owen King, released on September 26, 2017.
 The book was first mentioned during a promotional appearance on Q, a CBC Radio program, based in Toronto, Ontario, Canada.
 Of the novel, Stephen King stated, "Owen brought me this dynamite idea and I've collaborated a couple of times with Joe.
 I'm not going to say what the idea is because it's too good."
 The novel was officially announced in June 2016 and is said to take place in a women's prison in West Virginia during a strange mystical occurrence that causes all the women in the world to fall asleep.
 An excerpt was published on September 1, 2017 by "Entertainment Weekly" in their special "The Ultimate Guide to Stephen King" issue.
The Native Writers' Circle of the Americas (NWCA) is an organization of Native American writers, most notable for its literary awards, presented annually to Native American writers in three categories: First Book of Poetry, First Book of Prose, and Lifetime Achievement.
 The awards are voted upon by Native American writers, making it one of the few literary awards presented to Native Americans by Native Americans.
Stephen Edward Ambrose (January 10, 1936 – October 13, 2002) was an American historian and biographer of U.S. Presidents Dwight D. Eisenhower and Richard Nixon.
 He was a longtime professor of history at the University of New Orleans and the author of many bestselling volumes of American popular history.
Halleck: Lincoln's Chief of Staff is the biography of Union Army General-in-Chief Henry Halleck written by Stephen E. Ambrose and published in 1962.
 In this book, Ambrose provides an interpretation contrary to previous assessments of this "controversial figure" from the American Civil War.
Black House is a horror novel by American writers Stephen King and Peter Straub.
 Published in 2001, this is the sequel to "The Talisman".
Technician fifth grade John "Jack" McGrath, Sr. (c. 1919 – April 24, 2012) was a United States Army soldier who served with Easy Company during World War II.
 He is mentioned in the book "Band of Brothers", written by historian Stephen E. Ambrose, and was portrayed in the HBO miniseries "Band of Brothers" by Stephen Walters.
William James "Will" Durant ( ; November 5, 1885 – November 7, 1981) was an American writer, historian, and philosopher.
 He is best known for "The Story of Civilization", 11 volumes written in collaboration with his wife, Ariel Durant, and published between 1935 and 1975.
 He was earlier noted for "The Story of Philosophy" (1926), described as "a groundbreaking work that helped to popularize philosophy".
Hugh Alexander Ambrose (August 12, 1966 – May 23, 2015) was an American historian and the author of a best-selling popular history of the Pacific Theater in World War II.
 Ambrose rose to prominence as a researcher for and collaborator with his father, historian Stephen E. Ambrose.