Here's a quick summary:
"In another irresistible combination of danger, mystery, and romance, Stephenie Meyer tells the devastating story of Bree and the newborn army as they prepare to close in on Bella Swan and the Cullens, following their encounter to its unforgettable conclusion."
It sounds really cool, but wait there's more! The book will go on sale on June 5, but if you can wait until June 7, you can read it online in English for free until July 5, 2010. It's Stephenie Meyer's way of saying thank-you to her fans. On her website she says, "You all have bought a ton of my books, and I wanted to give you this story as a gift."