It's possible that "Mr. Nobody" is a poem you've encountered in a specific context, such as a school assignment, a local publication, or a personal collection.
To help me identify the author, could you please provide more context?
For example:
* Where did you encounter this poem? (e.g., a book, website, classroom)
* Do you remember any lines from the poem?
* Is there any information about the author or the poem itself?
With more information, I might be able to help you find the author of "Mr. Nobody".