Sequels

So, I'm about to dive into the new Artemis Fowl book, when I realize that I really can't remember what happened in the previous book. I strained my brain to remember something - anything - about the plot, but all I could think of were some random bits from some of the previous books in the series. I looked at my Goodreads review, which was pretty vague about the plot. (I avoid plot summary in those reviews to avoid spoilers, so that wasn't a big surprise.) I finally turned to Wikipedia to read a plot summary, and while it sounded familiar, I could barely follow the convolutions of the time travel story. Crossing my fingers about starting the new one...