Below you can find the Last name shared by invisible man author ralph & a boy and his dog author harlan Jeopardy Words Answer. The answer to Last name shared by invisible man author ralph & a boy and his dog author harlan has 7 letters. This clue belongs to the Author, author category and is part of Jeopardy Word Level 2302. If you scroll near the bottom you will find other clues and answers part of level 2302