Samuel Smiles' book, 'Lives of Boulton and Watt. Principally from the Original Soho Mss' is a thorough examination of the lives and achievements of two prominent figures in the Industrial Revolution, Matthew Boulton and James Watt. Smiles meticulously portrays the revolutionary impact of their work in the field of engineering and industry, shedding light on their innovative contributions to steam power and machinery. The book is written in a detailed and informative style, providing readers with a glimpse into the technological advancements that shaped the modern world. The historical context of the Industrial Revolution is vividly depicted, making this book an essential read for those interested in the history of technology and innovation. Samuel Smiles, a renowned Scottish author and reformer, was known for his works promoting self-help and industrial progress. His background in engineering and interest in the achievements of Boulton and Watt likely inspired him to delve into their lives and legacies. Smiles' passion for showcasing the transformative power of technology shines through in this meticulous biography. I highly recommend 'Lives of Boulton and Watt' to readers fascinated by the history of technological innovation and the Industrial Revolution. Samuel Smiles' insightful portrayal of Boulton and Watt's lives offers a captivating journey into the world-changing advancements of the 18th century.