Taylor (2019) details heterogeneity in the effects of the National Industrial Recovery Act (NIRA) across industries and across time. Through first the President’s Reemployment Act (PRA) and then industry-specific “codes of fair competition,” the NIRA raised wages and restricted working hours. In some—but far from all—cases industries also used a NIRA code to collude, raising prices and restricting output. The effect of the NIRA peaked in fall 1933 and winter 1934; thereafter, compliance declined. I review the intellectual history of the NIRA, the implementation of the PRA and the NIRA codes, and Taylor’s econometric evidence on their effects. I end with a discussion of the implications of Taylor’s book for understanding the effect of the NIRA on US recovery from the Great Depression. (JEL D72, G01, H50, N32, N42)