Leif G.W. Persson is Scandinavia's most renowned criminologist and a leading psychological profiler. He has also served as an advisor to the Swedish Ministry of Justice. Since 1991, he has held the position of Professor at the National Swedish Police Board and is regularly consulted as the country's foremost expert on crime.

He is the author of ten bestselling crime novels including The Dying Detective which won both the Swedish Academy of Crime Writers' Award for Best Crime Novel of 2010 and The Glass Key for Best Scandinavian Crime Novel of 2010.

During his career Persson has been the recipient of many other prestigious awards including The Piraten Award, The Swedish Academy of Crime Writers' Award (which he has won three times), The Finnish Whodunnit Society's Annual Award for Excellence in Foreign Crime Writing, The Petrona Award for Best Scandinavian Crime Novel, and The Danish Academy of Crime Writers' Palle Rosenkrantz Prize.

Neil Smith has translated many acclaimed Norwegian and Swedish novels, including books by Fredrik Backman and Leif G. W. Persson's The Dying Detective, winner of the CWA International Dagger 2017. He lives in Norfolk.