Like a Double Negative

You'll scarf this one down in one sitting, so plan properly--much better for a plane or a beach than an attempted covert jury-duty read. As the story unfolds, there are twists, turns and double-backs, until the very end. Sure, there are a couple of reality check moments, but we have to give the author a little leeway in the interest of entertainment, right? Captivating, fun, and an easy psychological mind-bender. I can't believe this is her first book.