Top critical review
A quick introduction into crypto but factual wrong in technical fundamentals
Reviewed in the United States on July 28, 2020
The book gives a very quick overview of the most important blockchain projects as of the time the book was written.
Be warned: the book is very light on its coverage of technical details of blockchain technology and in some cases it is simply wrong!
In chapter 2 the authors claim that blockchain is similar to a gigantic publicly shared Excel spreadsheet. Unfortunately this claim is simply wrong! A shared Excel spreadsheet is a single file and therefore a single and central source of truth. If being corrupted or deleted, a shared Excel spreadsheet becomes a central point of failure. Blockchain is a distributed system without any central point of failure and therefore the complete opposite of a shared Excel spreadsheet. The very fact that Mehta, Agashe, and Detroja considered a shared Excel spreadsheet an appropriate metaphor for blockchain, show that they have severe deficits in their understanding of blockchain technology.
The explanations of asymmetric cryptography, digital sinaturs, cryptographic hash functions, consensus, blockchain data structure, immutability of blockchain data structure provided in the book barely scratch the surface and raise more questions than they provide answers. The authors' undifferentiated and sloppy use of the terms 'distributed', 'decentralised' and 'shared' confirms the impression that they have deficits in understanding basic concepts of blockchain. Hence, if your goal is to truly understand how and why blockchain works, this book is definitely not for you!
To sum up, if you are looking for a quick overview on crypto and blockchain applications without need or interest in understanding how and why blockchain works, you may consider reading 'Blockchain Bubble or Revolution'! But if you truly want to understand how and why blockchain works you should consider one of the following books whose authors did a much better job in explaining blockchain: 'Blockchain Science' by Roger Wattenhofer, 'Mastering Bitcoin' by Andreas Antonopoulos, 'Blockchain Basics' by Daniel Drescher or 'Mastering Blockchain' by Imran Bashir.