Cuckoo Song (novel)

Cuckoo Song is a 2014 gothic fantasy novel by Frances Hardinge. The story is set in post-World War I England and follows the experiences of Triss Crescent, a young girl who wakes up after an accident with gaps in her memory and a pervasive feeling that something is terribly wrong.

The novel explores themes of identity, memory, family secrets, and the nature of reality. As Triss investigates the changes in herself and her surroundings, she uncovers a disturbing truth: she has been replaced by a changeling, a creature from the faerie world. The "accident" was actually a kidnapping, and the creature inhabiting her body is not truly her.

The narrative unfolds as a mystery, with Triss attempting to reclaim her life and understand the motives behind her abduction. She is aided by her younger brother, Sebastian (known as Seb), who is ill and possesses unique insights into the supernatural events unfolding around them. Together, they navigate a dangerous world of fae folklore and confront the dark secrets that lie hidden within their family's past.

Cuckoo Song is notable for its atmospheric writing, complex characters, and exploration of themes relating to childhood trauma and the power of sibling bonds. It has been praised for its imaginative world-building and its ability to blend elements of historical fiction, fantasy, and horror.