Agreeing with NGD and AC Stranger, The Lost Colony is definately the high point of the series, and contains everything Epic that it could have possibly stuffed into it (hell, I want to go visit the Taipei 101 SOLELY because of this book), aside from the gotcha!introduction of Minerva, who has yet to show up again. I didn't really like her, but that's no excuse to use her, then leave her like Colfer did.
Time Paradox sounded cool (more time-travel? Awesome! - right?), but all-in-all, it seemed to me that the sole reason of the book was to push Artemis and Holly towards one another (with, might I add, all the subtlety of a nuclear warhead). And having Opal Koboi show up again was, to me, annoying. It's great that he didn't just forget about her and her evil, wicked ways (not like Minerva, at least), and that, yes, with her around there'll always be some evil, wicked villain about, but the whole thing seemed rushed and poorly done. Save the animals? Bah. For every animal you save, I kill and eat three.
Atlantis Complex was even worse. Still sounded cool (because of Artemis' magic-dabbling, he gets a magical disease and goes crazy n' stuff? Awesome! - right?), but came off as another badly-done attempt at pushing Arty and Holly towards one another (it honestly would have been more subtle for Colfer to hire a fangirl, who goes around, picks up the book, and smashes it into your face yelling "Artemis x Holly fo'evah!" repeatedly until you black out). The characters all seemed too...two-dimensional. Foaly, Mulch, and Juliet were there solely for the purpose of insulting each other and making snide remarks about this-and-that. Holly was there to be all concerned for Artemis. Artemis cycled between being out-of-character and being someone else entirely. Orion was overused - like, WAY too much. It may have been funny the first time he spoke up. It may have been sorta lulzy the second time. But after that, I was just annoyed. I was surprised I managed to read the entire book.
Then there was the randomly-appearing use of Runes, which we had NEVER heard of before now. Turnball is here, and (though I did bitch about her before) I was honestly hoping for an Opal Koboi book, just so we could END HER. FINALLY. But, no. She was down there, though, when the place got evacuated or whatever. Giant squid and all. Yeah.
The kicker, though, was the ending, in which......well, honestly there WAS no ending. It just...stopped. Like, in the middle of the story. You get near to the end, going, 'okay, shit better wrap up real quick-like...', and then it doesn't and it just CUTS OFF in the middle of a paragraph. I think the book ends with the word "soup". Seriously. :sisi:
I'm just disappointed. There needs to be more fanfiction. And the last book had better make up for these last two, or I'm going to be very disappointed in you, Mr. Colfer!
...and hurry up on that movie. I know it's going to suck, but I don't care. I want it out already.