Much of the information presented today on blockchain suffers from being sketchy, one-sided, or complex in terminology. This is the first systematic presentation of blockchain in Russian, in which the author explains technologically complex concepts in clear language. In addition to the history of the emergence and description of the technology, the book covers the most popular projects implemented on blockchain, the existing and potential applications in various industries, as well as the problems of the relationship between blockchain projects and states. Finally, the author takes a detailed look at the most popular topics - investments in cryptoassets, the risks associated with them and the prospects of blockchain development. The book is addressed to a wide range of readers and will be of interest to both technical specialists and an audience far from financial and IT technologies.