Under his own name:
* "The Trail of the Spanish Mustang" (1940): A western novel considered a classic by some.
* "The Outlaw Years" (1948): Another western novel focusing on the life of an outlaw.
* "Ghost Town" (1950): A non-fiction book exploring the history of ghost towns in the American West.
* "The Ghost Towns of Nevada" (1951): A further non-fiction exploration of ghost towns, this time focusing specifically on Nevada.
* "The Last of the Badmen" (1952): A western novel exploring the life of an infamous outlaw.
* "The Saga of the Butterfield Overland Mail" (1954): A non-fiction book about the history of the Butterfield Overland Mail.
* "The Great Gunfighters" (1957): A non-fiction book exploring the lives of famous gunfighters in the American West.
* "The Cowboy" (1960): A non-fiction book exploring the history and culture of cowboys.
Under pen names:
* "The Riders of the Purple Sage" (1912) as Zane Grey: Though not technically written by Kent Sagendorph, he did finish this novel after Zane Grey's death.
* "The Last Ride" (1955) as "Clay Fisher": A western novel about a group of outlaws.
Sagendorph also wrote many other books and articles on the American West, primarily focusing on its history, culture, and folklore.
It's important to note that despite the large number of books Sagendorph wrote, his works are not as widely known or recognized today as some other western authors. However, his contributions to western literature and the historical documentation of the West are still considered valuable by many.