When a severed leg is delivered to Robin Ellacott's office in a box addressed to Cormoran Strike, the investigation becomes personal. The accompanying note quotes a Blue Öyster Cult song and points to four men from Strike's past — Donald Laing, Noel Brockbank, Terence "Digger" Malley, and Strike's own former stepfather Jeff Whittaker — each of whom he believes capable of such an act. As Strike and Robin investigate each suspect, the case deepens into Strike's own history: his military career, his mother's chaotic entourage, and the parts of his past he has never fully examined.
The third Cormoran Strike novel is the darkest and most psychologically intense instalment to that point, interspersing chapters narrated from the killer's own point of view — a structural departure from the first two books. It is also the novel in which Robin's personal circumstances — her relationship with her fiancé Matthew, her own past trauma, and her decision about her professional future — take centre stage alongside the investigation.
Published in October 2015, Career of Evil was shortlisted for the Theakston Old Peculier Crime Novel of the Year award in 2016. The title comes from the Blue Öyster Cult song of the same name, and the band's song titles serve as chapter headings throughout the book.