The transition toward more sustainable cities that address climate change is a global challenge. The ability of urban leadership to guide this transition is critical as urban centers are the main contributors to climate change pollution. This book by Joan Fitzgerald presents Greenovation by giving an overview of policies in North America and Europe. Strategies, successes, opportunities, and obstacles toward more sustainable cities are highlighted. The simple format makes the book easy to navigate and includes acknowledgments, a short table of contents, notes, a bibliography, and an index. The writing is easy to understand making it accessible outside of the academic community. The author is an expert on urban and public policy and urban climate action. In this work, she presents an urgency for cities to reduce their carbon footprints and provides examples showing how elected officials, planners, and other stakeholders, design, implement and create effective policies and programs to reduce greenhouse gas emissions. According to Fitzgerald, "To a surprising degree, cities have been innovators, instigators, and channels for public engagement in addressing the climate crisis" (p. 206). This is an interesting read for anyone trying to understand or implement policies to address climate change or sustainability within cities especially in North America or Europe. The primary argument of the book is that "cites are limited by state and national policy mandates and restrictions for good or for bad, as well as by their own fiscal limits. Yet, cities are on the front lines of both the impact of climate change and the effort to devise creative responses" (p. 205). The book illustrates in detail the challenges faced among cities, states, and countries in meeting sustainability goals. At first glance, the book title "Greenovation" could be interpreted as an all-encompassing word for sustainability-related topics, such as climate change adaptation, environmental protection of air and water and especially the growing topic of greening cities. However, the author focuses on three areas: energy efficiency, renewable energy, and transportation efficiency.