This is the best book I've read on the basics of blockchain technology. It explains blockchain in a simple, very easy to understand manner. It first explains bitcoin which is the first use of blockchain and then ethereum and smart contracts. When you want someone to explain something to you like you like you are 5 this is it. So if you are a complete beginner that is interested in learning about blockchain, bitcoin, or ethereum I highly recommend this book. If you are not a beginner then this book is not for you. After getting to understand the basics from this book I would encourage you to learn about triple entry accounting which is the accounting method that blockchain is based off of.