[3] It reached number 7 on the US bestseller list, the highest position for a debut novel by a British author since J. K. Rowling.

[4] He wrote the novel between shifts whilst working as a National Health Service (NHS) audiologist.

She learns that she has been seeing a doctor who is helping her to recover her memory, that her name is Christine Lucas, that she is 47 years old and married and has a son.

As her journal grows it casts doubts on the truth behind this knowledge as she determines to discover who she really is.

[7] Ridley Scott acquired the film rights and hired Rowan Joffé as director.