Hydraulic fracturing – fracking – is an unconventional extraction technique used in the oil and gas industry that has fundamentally transformed global energy politics. In Fracking Uncertainty, Heather Millar explains variation in Canadian provincial policy approaches, which range from pro-development regulation to moratoria and outright bans. Millar argues that although regulatory designs are shaped by governments’ desires to seek out economic benefits or protect against environmental harms, policy makers’ perceptions of said benefits and/or harms are mediated through socially constructed narratives about uncertainty and risk.  Fracking Uncertainty offers in-depth case studies of regulatory development in British Columbia, Alberta, New Brunswick, and Nova Scotia. Drawing on media analysis and interviews with government officials, industry representatives, academics, and environmental advocates, Millar demonstrates how risk narratives foster distinctive forms of learning in each province, leading to different regulatory reforms.