While wearing an engagement ring big enough to signal the space station in this updated sixth Blackbird mystery, impoverished Philadelphia heiress Nora Blackbird has finally agreed to marry Mick Abruzzo, maybe New Jersey's most notorious mob boss. But the Blackbird sisters find themselves distracted from wedding plans by the disappearance of former Hollywood starlet Sweet Penny Devine. It's polo players, a handsome foodie, some animal rights activists,...