In this episode, TPV editor John Horgan interviews Daniel Koehler, founding director of the German Institute on Radicalization and Deradicalization Studies and a world leading scholar of radicalization and deradicalization on his recently published book From Traitor to Zealot: Exploring the Phenomenon of Side-Switching in Extremism and Terrorism.

Terrorism and Political Violence is a podcast series produced by the Journal of Terrorism and Political Violence (TPV) in collaboration with Utrecht University. This podcast is comprised of two types of episodes. In Issues up close, editors of the TPV journal will discuss a range of subjects from prominent issues covered by the journal such as the history of terrorism, its causes and consequences, questions concerning political violence and major global trends and threats. In our Book Talks episodes, editors will host conversations with experts from across the field to discuss their current work. More information about this series, and other episodes, can be found on www.uu.nl/tpv. With special thanks to Pieter Veen for the soundtrack.