Innocent Blood is a standalone thriller and chilling mystery from P.D. James, the best-selling author of Death Comes to Pemberley and Children of Men.

Philippa Palfrey, adopted as a child, believes herself to be the motherless, illegitimate daughter of an aristocratic father. At eighteen she exercises her right to find out the truth. What she discovers will change her life forever. Philippa enters a new and terrifying world and soon comes to realize she is not the only one interested in her parents' whereabouts.

Innocent Blood is both a mystery and a thriller, a superb novel that explores the themes of self-identity and the meaning of life.

P. D. James was a best-selling and internationally acclaimed crime writer. She was the creator of Adam Dalgliesh and Cordelia Gray and their long and successful series of mysteries. Her works include Cover Her Face (1962), An Unsuitable Job for a Woman (1972), Innocent Blood (1980),Children of Men (1992), and the Jane Austen-inspired Death Comes to Pemberley (2011).

James was born in Oxford in 1920. She won awards for crime writing in Britain, America, Italy, and Scandinavia, including the Mystery Writers of America Grandmaster Award. She received honorary degrees from seven British universities, was awarded an OBE in 1983, and created a life peer in 1991.

In 1997 she was elected president of the Society of Authors,and stood down from this role in 2013.