Having recently visited Cragside, Armstrong's "country retreat", I was prompted to read this thorough and comprehensive biography about his life and times, the second half of the 19th century, with Industry (capital I) in full steam. Armstrong comes across as innovative, entrepreneurial, and at the forefront of many of the innovations of the time. Industrial relations were in their infancy; planning laws, environmental considerations and climate change had not been thought of ~ so were not part of this industrialist's considerations at all. He just seemed to "let rip" and get on with things, and make vast amounts of money in the process. Much of this money went into creating Cragside and its environs out of a previously bleak and barren hillside; also, latterly, Bamburgh Castle and surrounding area. I thought of him, in many respects, as a kind of Elon Musk of his day. Interesting to compare what Armstrong and Musk (along with Bezos and suchlike) do with their vast wealth.