I read The Alchemyst in mid-January this year and I really, really liked it. It was so well done. I think I love Sophie, and I was back and forth on Josh because I totally understand his frustration and feelings, but at the same time, I wish he'd try seeing it from Sophie's point of view.
Perennelle is wicked cool, and Nicolas rocks. I was crushed when ... shoot, what's her name? I need to reread. Anyway, I hate when the goddess-whose-name-I-cant'-remember-but-it-starts-with-an-'H'-I-think...I was crushed when her realm collapsed. (EDIT: Her name is Hekate. ) Those mud men - golems - are highly creepy, too. And Dee - how deliciously, disturbingly evil is that guy?!
I LOVE the whole aura/scent thing, and I laughed when Sophie and Josh's auras were oranges and vanilla ice cream. Made me think of orangicles (Dreamsicles are their actual name here, the orange stuff wrapped around vanilla ice cream on a stick?), and I actually had to go get some. 'Cause they're good.
The friend who told me about these books actually found a video trailer - about the books, not any possible films - and it's pretty cool. In the video, neither Nicolas nor Dee look anything like what I imagined, nor do Sophie or Josh - but the Morrigan looks incredible, and it's quite awesome that a trailer was even made for the books.
Here it is, if you'd like to watch/see it: The Secrets of the Immortal Nicholas Flamel