Horsefly Dress is a meditation on the experience and beauty of suffering, questioning its triggers and ultimate purpose through the lens of historical and contemporary interactions and complications of Sélis, Qĺispé, and Christian beliefs. Heather Cahoon's collection explores dark truths about the world through first-person experiences, as well as the experiences of her family and larger tribal community. As a member of the Confederated Salish and Kootenai Tribes, Cahoon crafts poems that recount traditional stories and confront Coyote's transformation of the world, including his decision to leave certain evils present, such as cruelty, greed, hunger, and death.

By weaving together stories of Cahoon's family and tribal community with those of Coyote and his family, especially Coyote's daughter, Horsefly Dress, the interactions and shared experiences show the continued relevance of traditional Sélis and Qĺispé culture to contemporary life. Rich in the imagery of autumnal foliage, migrating birds, and frozen landscapes, Horsefly Dress calls forth the sensory experience of grief and transformation. As the stories and poems reveal, the transformative powers associated with the human experience of loss belong to the past, present, and future, as do the traditional Salish-Pend d'Oreille stories that create the backbone of this intricate collection.