And now, can I just say "amen" to Chad's post and call it good? I agree with him. The characters were all well-developed. It was very entertaining (I love Dave Barry... I've always thought he's hilarious). It did move quickly and made for a short, but good, read. It was adventurous. Witty. And I loved how they threw in some other references -- like how the Loch Ness monster was created, or how all the Greek mythology was actually people just hopped up on 'starstuff'.
The ending did feel a little rushed to me, too. Within the space of only a few pages, Peter defeats Black Stache (love that name, by the way), learns he can fly, learns he won't grow old, decides to stay forever on the island, and gets a fairy. I think a little more details would have been good, since the rest was more well-developed. But it was still a thoroughly enjoyable read. I'm definitely going to look into getting the other books in the series from the library.