We are pleased to share our new review of structural covariance networks (SCN) in brain MRI studies of schizophrenia. This two-part article is available through the journal Schizophrenia Research. Part one covers the statistical and methodological underpinnings of SCN, and part two examines specific findings from graph theory, and applications of graph theory to understanding patient-control SCN differences. Structural covariance continues to be an important and ongoing aspect of our research.