The Never Ending Story

An explorer is venturing through an old tomb when they discover a book, but this is no ordinary book it seems to be telling the story of this explorer.  All of a sudden a monster crashes through the wall. The explorer looks for a way out and notices their is more writing in the book, a description of how to get out of the tomb.

You must write this book in the past to guid the explorer to saftey in the present.