"Feathers--no matter what size or shape or color--are all the same, if you think about them. They're soft. Delicate. But the secret thing about feathers is . . . they are very strong." In the pre-Katrina glow of New Orleans, Amanda Salassi is anxious about chaperoning her daughter's sixth-grade field trip to the Big Easy during Halloween. And then her worst fears come true. Her daughter's best friend, Sarah, disappears...