Persistence of Memory is the tenth novel by American teen author Amelia Atwater-Rhodes and is the fifth novel in her Den of Shadows series.

The novel also mentions a character from Atwater-Rhodes's previous novel, In the Forests of the Night (1999), Alexander, the brother of the protagonist, Risika.

When Shevaun starts realizing what is going on she sets out to kill Erin to break their connection.

She, her boyfriend, and friends move to the city in which Erin lives, bringing them to the attention of the Triste witch line.

Eventually, the two meet and the struggle to break their link continues inside Erin's head.