'Since the first edition was published, blockchain has risen from tentative proofs-of-concept and innovative pilot use-cases into the mainstream of digital transformation and social innovation. This second edition provides an up-to-date relook at some of these notable changes, particularly in how blockchain interoperates with AI, IoT and, potentially, quantum computing to deliver the kind of epochal change that the Internet delivered. I commend Professor Kshetri for authoring yet another comprehensive and readable monograph of significance.'.