"The Sentinel” by Arthur C. Clarke became 2001: A Space Odyssey.
“The Birds” by Daphne du Maurier.
“Breakfast at Tiffany’s” by Truman Capote.
“The Body Snatcher” by Robert Louis Stevenson.
Or to put it another way—when does a memoir or biography become fiction? I like books labeled as non-fiction to be just that, but I like lots of facts in fiction.