bitcoins. Nerd money? Digital gold? Perhaps, definitely social revolution. This is the thought of the two authors after having put the Bitcoin protocol into practice with real and concrete examples. Their mantra is: "To deeply understand any technology we must touch it with our hands, seeing with our own eyes the results we can obtain". They were not satisfied with knowing superficially what a transaction is and how it is identified in the blockchain, or why the merkle tree is used, or even how private keys are managed in the deterministic wallet. They wanted to get the results step by step explaining all the nuances. Fasten your seat belts, you are about to embark on a journey into cypherspace, when you return you will be aware, you will realize why Bitcoin has what it takes to shift the balance. You don't need to be a miner to do mining as you don't need to be a programmer to understand that there is no more time to ignore it. The train is whistling: invest the most precious asset at your disposal, time, and take a seat in the carriage to reach the decentralized future where globalization is taking us.