A black book is a notebook where graffiti artists sketch their initial drafts. It's generally shown to display their style to other graffiti artists. It also serves as a sort of "graffiti journal," allowing one to see how their style evolves chronologically.

In Palma de Mallorca, Cathy often accompanies her girlfriend, Nuria, to paint on highway fences, though Cathy prefers exploring the Metaverse with her new Oculus glasses.

In China, the government has just banned Bitcoin mining, forcing a miner named Bao-yu to shut down her money laundering business involving drug trafficking in cryptocurrencies. In revenge, Bao-yu decides to keep fifty million dollars in bitcoins, which she will desperately transfer to a random account in the Metaverse.

The adventure begins. Overnight, Cathy and Nuria become multimillionaires while the world's top intelligence agencies start chasing them. Their lives in the Metaverse become public, but real life is very different... though not as much as they would have wished.

J.P. Johnson lives on the island of Mallorca. A former bodyguard for military officials and a stockbroker, he now dedicates himself exclusively to literature. He is the author of the famous sagas "The Fifth Origin," "The Revenge of the Earth," and "The Devil on the Island" (published under his real name, Joan Pont), as well as the self-help series "Yes, I want. Yes, I can" and the children's book "A Pet for Tom."