The Circle Trilogy, written by Ted Dekker, is a suspenseful series that combines elements of fantasy, thriller, and surveillance state themes. The trilogy consists of three books: Black, Red, and White. The story follows Thomas Hunter, a man who discovers he can travel between two parallel worlds. As Thomas battles evil forces and uncovers a larger conspiracy, he becomes entangled in a web of surveillance and manipulation. This thrilling series offers a unique blend of genres and keeps readers on the edge of their seats.