For years, I’ve been collecting editions of Frederick Douglass’s Narrative of the Life of Frederick Douglass, an American Slave (1845).
“Why so many different editions of the same books?,” people ask when they become aware that there are more than 400 editions of Douglass’s Narrative. One main reason, in addition to intrinsic value of the book, relates to the high demand for Douglass's autobiography.
Since the 1960s when the Narrative was first reprinted, high school teachers and college professors regularly assigned the book in their courses. There are no copyright restrictions on the book, so any publisher that is willing and interested can reprint the book. Also, the accumulated general and scholarly interest in Douglass and the Narrative over time have accumulated over time.