Has anyone tried these yet? they are hard as hell and even more addictive then PS. try it!!
http://zestriddle.fanzine.pl/
click on the red Zest word
it will take you to:
http://zestriddle.fanzine.pl/zest_riddle/one.htm
delete the word "one" in the URL and type in "deeper" and hit enter.
there is your next puzzle, enter the answer in the same manner as the last one.
GOOD LUCK!! (you'll need it)
there's 72 in all and I'm only on number 8