I'd have probably rated this higher had their been a few more short stories included with this collection.
As it were, there were only three, and they were indeed quite short. They took up only 33% of the book, with the remaining 67% being taken up by previews of two of the authors other books: Super Zombie Juice Mega Bomb (which was an extended preview and the bulk of the preview section) and Zack & Zoey's Alien Apocalypse. I felt a little let down that the most of the book was previews, though, I guess it accomplished what it set out to do as I have to find out what happens in the Super Zombie Juice book. I've checked it out from the Kindle Owner's Lending Library.
The short stories included in this collection are, I think, suitably creepy for the age range they're set to appeal to, and I enjoyed them.