Who wrote the book the third level.?

Question

Who wrote the story the third level, its about a guy named charlie who traveled back in time

Answer 1

The title of the book is The Third Level of Existence and it is by Steven D. Brock.

In the second link that I listed you can read the book online.

Answer 2

The Third Level is a short story written by Jack Finney.  I think it was published in his book of short stories also called "The Third Level".