This is a very short work that purports to serve as an introduction to blockchain. Unfortunately, in reality it seems to be an amateur student paper masquerading as an authoritative introduction. Each chapter basically repeats the same cursory overview in slightly different words. I recall using a similar technique when I needed to write a high school paper and only had a few hours to fulfill a page requirement. There is no organization to be found because there are only about five pages worth of substance and stretching this thin layer over eighty pages precludes any attempt at organizing subject matter. I really derive no pleasure from being so negative, but I felt the need to at least present a different viewpoint from the majority of the preexisting reviews. If you want to tell people you read a book about blockchain, at least this one is short, but if you want to learn anything about blockchain besides a dictionary definition, seek substance elsewhere.