Bedford Square is the nineteenth book featuring Thomas and Charlotte Pitt in a series that spans more than twenty years since the first book, The Cater Street Hangman, was published in 1979. Included are Callander Square, Paragon Walk, Resurrection Row, Bluegate Fields, Rutland Place, Death in the Devil's Acre, Cardington Crescent, Silence in Hanover Close, Bethlehem Road, Highgate Rise, Belgrave Square, Farriers' Lane, The Hyde Park Headsman, Traitors Gate, Pentecost Alley, Ashworth Hall, and Brunswick Square. Published after Bedford Square, The Whitechapel Conspiracy continues the Pitts' adventures.

Perry is noted for her use of authentic Victorian settings, from the way the people live and dress, to their sense of class and honor.

Perry also writes a series starring William Monk, whose first appearance is in The Face of a Stranger, when he finds he has amnesia. Nurse Hester Latterly, who will become Hester Monk later in the...