The readers of the book Just Technology: The Quest for Cultural, Economic, Environmental, and Technical Sustainability, Second Edition of will benefit from its systematic approach in evaluating the true sustainability challenges facing society and will learn how to address these challenges in a just manner.Since the publication of the first edition of the book, the concept of a just society has become more important. Several new contemporary examples are now included to reinforce the concepts introduced in the previous edition. The book presents a framework to evaluate the appropriateness of technological approaches to address critical sustainable issues. The framework comprises four questions that aim to create more just approaches by broadening the context engineers consider when formulating solutions.Addressing the complexity of today's global challenges requires new ways of thinking. The idea that technology is always the best, maybe the only approach, needs to be reconsidered, and sustainable approaches must also draw from nontechnological areas.