Samuel Langhorne Clemens, or Mark Twain as he is known to many readers, wrote nearly two dozen books over the course of his career, not to mention the wide variety of essays that appeared in various literary magazines. He’s a popular author for new and seasoned collectors alike, and his fiction and essays have appeared in dozens of different editions for more than a century. Yet unless you’re extremely familiar with particular editions of Twain’s work, you may not be too knowledgeable about his many publishers. So, who were his publishers?