What should I read next?

Every time I finish a book, I then face the dilemma of choosing my next read from a towering pile (actually THREE towering piles) of books I've acquired but not yet read. It's a really hard decision for me because I want to read them ALL. So I've decided to add a new and EXCITING little number here. YOU, yes YOU, get to decide which book I read next. Each time I finish a book, I will grab 3-5 books from my piles and put a poll over to the right, where you can vote on my next read. Since I review the books I read here, you can essentially have me test read the books for you if you think they are ones in which you might be interested.

So anyway, last night I finished Plum Island by Nelson DeMille. This morning I selected for your decision-making pleasure, the following: The Dogs of Babel by Carolyn Parkhurst, Step on a Crack by James Patterson and either Brimstone by Douglas Preston and Lincoln Child OR The Wheel of Darkness by Douglas Preston and Lincoln Child.

I need some info on the Douglas Preston/Lincoln Child book (I'm looking at YOU Shauna, if you still come by here that is, I know it's been a while since I've been around). You might remember that I read a Preston/Child book a while back entitled The Book of the Dead (reviewed here) that turned out to be the seventh (I think) book in a series revolving around FBI Agent Pendergast. Being the anal retentive individual that I am, I prefer to read series books in order, even when they stand alone perfectly well. Since I also happen to buy most, if not all, of my books from bargain tables and library sales, or get them from Bookmooch, I don't happen to have all of the previous six to choose from, but I do now have two of them (assuming both of them come before The Book of the Dead), and I might as well read them in order. So Shauna or anyone else who might know, which of the two Preston/Child books here comes first?

Okay, now go VOTE. Because I'm drinking my coffee, but I have nothing to read while I am doing so. In the future, I will have to put these polls up the day before I'll finish a book, so there's one on deck. I guess today I'll just clean the house or something, maybe put away Christmas decorations, until the poll time is up. This time, I'm only going to give 12 hours of voting time, since I'm needing a decision NOW, but in the future I'll give 24 hours. Now VOTE!!!