User blog comment:1dra7/The Castaway Island Contest/@comment-2151472-20130722204912

Easier Clues:

Secret One - Check out episode Five. It's not hidden in the parapgrahs--rather, it's on the outer text regions.

Secret Two - Check out episode Six. Look for something that resembles a hidden code. Hint: It's definitely not in Scarlet's letter. Totally not hidden in there at all.

Secret Three - Check out episode Seven. Look for a resemblance like in the first secret.

Secret Four - Check out episode eleven when it gets released for a new secret just like in the Episode Five.