John Seelye wrote The Adventures of Tom SawyerThe Adventures of Tom Sawyer is written by Mark TwainMark Twain wrote The Tragedy of Puddn'head Wilson
[Human]: Do you have information on John Seelye? Is he a writer or actor? [Assistant]: He is first and foremost and basically a writer who has written Tom Sawyer, The Adventures of Huckleberry Finn and A Princess of Mars. [Human]: The Adventures of Tom Sawyer, is that written by Mark Twain? 
Yes he is the writer for the book and he also wrote The Tragedy of Puddn'head Wilson.