Operation Samarium by Carlos Usín

It seemed like just another burglary, a not unusual art theft from a villa in a luxury private estate in Marbella. It was a smoothly executed robbery by what appeared to be an international and highly professional gang. But what at first appeared to be a simple theft, by the next day was a robbery and two murders. The investigation begins in the prison of Alhaurín de la Torre and continues in Puerto Banús, where it follows the trail of a private yacht owned by a character who hides behind a diplomatic passport, although, in reality, he is an agent of his country's secret services, with dark and powerful connections in the highest echelons.
The resolution of this complex case involves the participation of the Spanish National Intelligence Services together with the crucial work of an agent infiltrated into the organisation responsible for investigating the criminal venture. If successful, the operation would have international, diplomatic and economic ramifications. The only solution i

It seemed like simply another burglary, a not unusual art theft from a villa in a luxury private estate in Marbella. It was a smoothly executed robbery by what appeared to be an international and highly professional gang. But what at first appeared to be a simple theft, by the next day was a robbery and two murders. The investigation begins in the prison of Alhaurín de la Torre and continues in Puerto Banús, where it follows the trail of a private yacht owned by a character who hides behind a diplomatic passport, although, in reality, he is an agent of his country's secret services, with dark and powerful connections in the highest echelons.
The resolution of this complex case involves the participation of the Spanish National Intelligence Services together with the crucial work of an agent infiltrated into the organisation responsible for investigating the criminal venture. If successful, the operation would have international, diplomatic and economic ramifications. The only solution is an extraordinary international collaboration to prevent the criminals achieving their objectives.
It is a story in which thieves, con men, spies, secret agents, bogus diplomats, corruption and treachery intermingle. A story in which the plot moves at a fast pace, with a totally unexpected ending.