There are all different kinds of ghost stories and types of ghosts. Maybe the ghost is a malicious spirit out for revenge, or a marshmallow man parade float come to life, or maybe it's truly a friendly ghost — Casper, here to be pals. In today's first featured interview, Here & Now's Robin Young talks with Louise Erdrich about her novel The Sentence which is set in a haunted bookstore in Minneapolis. Then NPR's Ailsa Chang interviews Kevin Brockmeier about his book of short spooky stories The Ghost Variations.