This book has provided a comprehensive exploration of shale gas production, covering foundational concepts, gas transport dynamics, and hydraulic fracturing techniques in multi-stage horizontal wells. Our goal has been to equip readers with both theoretical knowledge and practical insights, making this resource beneficial for students, researchers, and industry professionals. Although we have aimed to cover the essential aspects of shale gas engineering, time constraints have limited the depth of our analysis in certain areas. We kindly ask readers to consider this, and we appreciate your understanding of any limitations or areas where further elaboration could have been beneficial.