Storm Warning (The 39 Clues, Book 9)

The New York Times bestselling series. On the hunt for the 39 Clues, Amy and Dan Cahill uncovered shocking information about their past - from what happened the night their parents died to the sattering discovery about their family branch. But the biggest secret of all remains behind Grace Cahill's alternate will. Now, Amy and Dan are about to discover a long-hidden secret of the Cahils - a secret so dangerous that people died to protect it. Will this be the end of them? Or just the end of everything they think they knew?

Linda Sue Park became a professional writer when she published her first poem at age nine. She went on to become a journalist, a food critic, and an English teacher, but Park did not test her hand at writing fiction until she was in her midthirties, at the same time that she began to explore her Korean heritage in earnest. Her research resulted in a treasure trove of children's books, each of which delves into a different piece of Korean history. In 2002, Park was awarded the Newbery Medal for her third novel, A Single Shard becoming the first Korean American to take home the honor.