Ralf Langroth is the pseudonym of an author with translations in fifteen languages. Four of the author’s books are currently optioned for film adaptation by a top-tier production company. In his novel about BKA man Philipp Gerber and journalist Eva Herden, Ralf Langroth combines his two strengths: historically accurate research and the creation of high tension.

Florian Schwiecker was born in Kiel in 1972 and worked for many years in Berlin as a criminal defense attorney. The idea for his first thriller Betrayal was born during his work for an international business enterprise in the USA. Florian Schwiecker also regularly recommends crime thrillers in his thriller column on freundin.de.