Zubrick's Rock: A Novel - Tapa dura

Multimillionaire recluse Barry Zubrick's tax exile in glamorous Monte Carlo is threatened when the police revoke his residency permit. So Zubrick, who has always wanted his own country, plots to overthrow the picturesque principality.
With the assistance of a former CIA official, Zubrick schemes to seize Monaco "legitimately" by tracing a descendant of the Spinola family, which briefly ruled the principality over 700 years ago - and installing him as the true prince.
Enter Gerry Spinola - dentist, gambler and alcoholic from Hoboken, New Jersey - and the only heir Zubrick can dig up on short notice. Zubrick cuts a deal with Spinola to become his puppet.
Stirring a retired general and a band of soldiers-of-fortune into his mix, Zubrick assembles the ingredients for a coup d'etat.