Over the weekend I watched "Percy Jackson: Sea of Monsters." Of course, I wore my t-shirt with the slogan, "The book was better." It left out some things from the book, like the empathic link between Percy and Grover, but the movie was pretty good. There was lots of action, some time spent in Camp Half-Blood, and we finally get to meet Percy's half-brother, Tyson. (The way Tyson looks in the movie reminds me of Brendan Fraser's character, Link, in "Encino Man.") Other mythological beings also make an appearance - a hippocampus, Hermes, Charybdis, Polyphemus, Kronos, the Gray Sisters, and even a manticore.
If you are a fan of the books, or like fantasy movies, then you will probably enjoy "Sea of Monsters."
You can visit Rick Riordan's website for more information about all the books in the series, and the movie has its own website.