Skeleton Key is the title of a comic book by British author Andi Watson.
The first protagonist is Tamsin, a high-school student living in Canada, who discovers the magical skeleton key that lends the series its title.
While exploring these alternate worlds, she encounters the second protagonist, Kitsune, a Japanese fox spirit.
In 2011 Watson returned to Skeleton Key with a series of short stories for Dark Horse Presents, an anthology title.
These were collected in the "Skeleton Key Color Special", published as a one shot in 2012 from Dark Horse Comics.