While I was introduced to Rose as one of the ghost aunts to the Price family in the InCryptid series, based on the introduction and afterword of this collection, Seanan McGuire has been writing about Rose Marshall, a hitchhiker ghost, for much longer, and only later decided to include her in as part of the extended family. Rose slipped into InCryptid so seamlessly that I didn’t even realize until reading this that she wasn’t added until later since her and Mary aren’t exactly friendly initially. […]