In this important new book, Drinóczi and Bien-Kacała explore recent constitutional changes in Hungary and Poland and provide valuable insights into the nature and origins of these developments, and how they should be conceptualized within the broader comparative constitutional literature. Both Hungary and Poland, the authors suggest, have witnessed a sustained attack on a range of independent oversight bodies, including courts, and a retreat from liberal commitments to inclusion, openness, and transnational engagement. Yet, according to the authors, neither country has descended into full-scale authoritarianism, or a wholly arbitrary system of government. Each retains some commitment to limited government through adherence to national and European legal norms, or at least a partial willingness to apply and implement EU law. Drinóczi and Bien-Kacała thus suggest that these systems are neither wholly constitutionally democratic nor wholly authoritarian in character, but rather a form of hybrid regime. They label the current model of government in Hungary and Poland as “illiberal constitutional” in nature.