One Salt Sea is the fifth installment in the October Daye series by Seanan McGuire. The story follows October "Toby" Daye, a half-human, half-fae private investigator. In this novel, she faces a new crisis as a mysterious kidnapper takes the children of various fae families, including the children of the powerful sea fae. This threat draws Toby into a complex web of familial and political intrigue among the denizens of the sea.
As Toby navigates the dangerous underwater realm, she encounters old friends and foes, including her relationship with her own daughter, which adds emotional weight to her quest. The novel blends elements of mystery, fantasy, and the personal stakes of Toby's life, showcasing her determination to protect her loved ones while unraveling the layers of deception surrounding the kidnappings.
McGuire’s writing brings the vibrant underwater world to life, filled with intricate details about its inhabitants and customs. The character development, particularly of Toby, is a highlight as she grapples with her identity and responsibilities. Overall, One Salt Sea is a thrilling continuation of Toby Daye’s journey, combining action, emotion, and the rich lore of the fae universe.