Book excerpt: Many sedimentary basins worldwide contain extrusive and intrusive igneous rock sequences, and these rocks and associated magmatic processes can exert profound influences on a diverse range of basin processes and elements, including multiscale structural and tectonic development, heat flow, transport of hydrocarbons and other basinal fluids, and the hydraulic properties and integrity of reservoir and sealing units. Recent years have witnessed increased focus on improved understanding of igneous processes in basins to aid hydrocarbon exploration and development projects, and there is growing interest in the multifaceted role that igneous sequences in basins may play in the energy transition, for example as components of carbon capture and storage projects, and sources of geothermal energy, natural hydrogen and helium. This volume showcases state-of-the-art research from both academia and industry, drawing on global examples and addressing reservoir-to-plate scales, providing critical new data, knowledge and technological capabilities that highlight the opportunities, complexities and potential pitfalls associated with unlocking the energy resources of sedimentary basins impacted by igneous processes.