Philip Ringrose's new book, 'How to Store CO2 Underground: Insights from early-mover CCS Projects' is a clear, well-illustrated summary of the geological and engineering aspects of CO2 sequestration. Ringrose, who shares his affiliations between NNTU, Equinor and the University of Edinburgh, acknowledges a bias towards Norwegian and European projects and Equinor's CCS operations. However as these, especially Equinor's, are copiously studied and published, this is hardly a disadvantage. Ringrose's 'essential message' is that the engineered geological storage of CO2 is a relatively straightforward and established technology which will be urgently needed in the coming decades.