These read like they were written for a different edition, and someone attempted to translate them into 4th Ed, but didn't really understand the rules, and certainly didn't play-test most of them.
The stories are pretty dull and generic, and rather unimaginative. The only one that was slightly different was the 5th one, about a fey creature being imprisoned, instead of some undead or far-realms abomination. Pretty meh.
I'm glad I bought the book to review it so that you don't have to.