A murderess goes on an Arctic cruise and finds her long-ago high school prom date on the same ship. He destroyed her life 50 years before. Now she has the chance to destroy his. That’s the title story in Margaret Atwood’s new collection of short fiction, “Stone Mattress.” The book is peppered with odd but believable characters whose lives often take bizarre turns. There’s a fantasy writer who survives an ice storm with the help of her dead husband, a man who finds the corpse of a bridegroom in a storage locker and a woman whose retirement home is under siege by a violent group trying to rid the world of old people. Please join us for a conversation with author Margaret Atwood.