For the literary geniuses plz!
Who can tell me the name of this book by this description of the plotline?
A man from our modern day scientific world finds himself drawn into another, fantastic world where magic works. He discovers a correlation between computer programming and spell casting. He was able to create a demon named Emacs, who performed magic for him. The guy went back to his scientific world and collected other programmers to assist him with distributing "every man's Emacs" in the fantastic world.
Ready, go!