In 1979, Sophie Calle assumed the role of a stalker, following strangers through Paris and taking surreptitious photographs. Since then her practice has expanded into film, installation and performance, but she has continued to be fascinated by the delicate fiction of her own identity. Whether living her life as an imaginary character (2000’s Double Game) or exploiting the often upsetting facts of her own life (2003’s Exquisite Pain), her works are united by their eerie questioning of personal boundaries. Her first UK retrospective opens at London’s Whitechapel gallery this month.