More Percy Jackson goodness, but in a much smaller package!
This was fun, though given I was reading it in e-book form I wasn't exactly doing the puzzles and such included. I didn't mind that much, though; I was there for the short stories and just to see the characters a bit more. I enjoyed reading them and getting some clarification on a few things mentioned in the two main series, including a plot point regarding a Titan that had confused me a little bit when it came up later in the series. I thought I had missed something--it turns out it was this!
If you are a fan of the series, this is worth it for the short stories, I'd say, at the very least. The "interviews" with some of the characters are also interesting. It's a lot of fun, but definitely not to be touched until post-The Battle of the Labyrinth.