I would like to thank Joanna Zylinska, Gary Hall, Zach Blas, Vian Bakir, and Stephen Armstrong for their intellectual input at various stages of this project. I am also grateful for the support I have received from my colleagues at King’s College London and the assistance from the team at University of Minnesota Press. Last, I would like to thank the MA students at King’s College London who have taken my Cultures of Secrecy module over the past few years, helping me to think through and with the politics of the secret.