Norwegian-born Unni Turrettini grew up as a global citizen, living in Norway, the United States, France, and Switzerland. She has law degrees from Norway, France, and the United States, and is a member of the New York Bar. She worked numerous years in law and finance in Paris, France, and Geneva, Switzerland and returned to Oslo in 2016.
Unni is the author of The Mystery of the Lone Wolf Killer (Pegasus Books, 2015), which examines Norwegian mass murderer Anders Behring Breivik from both a psychological and sociological perspective and focuses on what we can learn from that tragedy to prevent rampage killings spurred by extremism. The Mystery of the Lone Wolf Killer won the 2016 Killer Nashville Silver Falchion award (Best Nonfiction).
She is also the author of Betraying the Nobel: The Secrets and Corruption behind the Nobel Peace Prize (Pegasus Books, 2020).
In 2016, Unni moved back to Norway after twenty years abroad and now lives in Oslo with her family.