Le passe muraille- Marcel Aymé

This is a book that I studied when I was in secondary school. I really liked it and yesterday I found the translation on internet. They also made a movie out of it with these really good french actors. If you have an hour to spare (it's a short novel), read it, it's a french classic! :)

http://www.stresscafe.com/translations/pm-final.pdf

Alternativelty, you can of course try yourself and read the original version:

http://palf.free.fr/nouvelle/passe_muraille.htm