Mercy Thompson is a fictional character and the protagonist of a series of urban fantasy novels written by Patricia Briggs. She is a mechanic and shapeshifter who can transform into a coyote. Set in a world populated by supernatural beings, Mercy navigates her life while dealing with various creatures, including werewolves, vampires, and other magical entities. The series begins with the novel "Moon Called" and follows Mercy as she confronts challenges related to her identity and the supernatural community. Throughout the books, she often finds herself in the middle of conflicts, using her unique abilities and resourcefulness to protect her friends and herself.