Crown jewel : a Simon Riske novel / Christopher Reich.

Enhanced descriptions from Syndetics:

Stolen sports cars, brilliant casino heists, and the brazen kidnapping of a prince: only shadowy spy for hire Simon Riske can stop the mastermind behind it all.
Monte Carlo's lavish casinos have become the target of a sophisticated and brutal team of professional gamblers; a casino dealer has been beaten to death; a German heiress's son has been kidnapped. Who better to connect the crimes and foil a daringly brilliant plot than Simon Riske, freelance industrial spy? Riske -- part Bond, part Reacher -- knows Monte Carlo well: it's where he was once a thrill-seeking thief himself, robbing armored trucks and leading police on dangerous car chases across the Côte d'Azur, until he was double-crossed, served his time, and graduated as an investment genius from the Sorbonne.
Now Riske is a man who solves problems, the bigger and "riskier" the better. From the baccarat tables of Europe's finest casinos to the superyachts moored in Monaco's Port Hercule to a secluded chalet deep in the Swiss Alps, Riske will do what he does best: get in over his head, throw himself into danger, and find a way to outthink and outmaneuver villains of every stripe.
In one of the most clever, enjoyable, and entertaining series to come along in years, this sequel to The Take gives readers what they want most: a hero we can root for, locales we wish we were in, and a plot that never lets up.

Reviews provided by Syndetics

Publishers Weekly Review

Early in Thriller Award winner Reich's entertaining sequel to 2018's The Take, Lord Toby Stonewall, Duke of Suffolk and shareholder in the Casino de Monte-Carlo in Monaco, approaches professional problem solver Simon Riske in London. Over the past few months, someone has been winning big at the casino's tables. Nearly $2 million has walked out the door, and the casino is facing bankruptcy. It's cheating on a massive scale, and Stonewall wants Riske to find out who's behind the crime. Risk is soon rubbing elbows with the international elite, including a beautiful heiress with deadly troubles of her own. Riske, a former gangster who once served time in prison for theft, is a self-made gentleman whose nefarious skills balance nicely with his now more polished exterior. All his talents come into play in this tale of high-stakes gambling, kidnapping, and murder. Reich infuses his narrative with numerous plot threads that seem separate but end up satisfyingly intersecting for a suspenseful ending. Readers will want to see a lot more of Riske. Agent: Richard Pine, Inkwell Management. (Mar.) © Copyright PWxyz, LLC. All rights reserved.

Booklist Review

Simon Riske, introduced in The Take (2018), is an international problem-solver with a checkered past who operates on both sides of the law. So the London-based American is just the person Lord Toby Stonewood, the mega-wealthy Duke of Suffolk, retains to uncover the cheating that is costing his famous Monaco casino millions. At his Monaco hotel, Riske encounters a striking German woman, who introduces herself simply as Vika Brandt, shortly before he saves her life from a car careening toward her on an isolated mountain road. When she reveals that she's actually a princess and heir to the von Tiefen und Tassis fortune, she asks his help in looking into the death of her mother, which police say was accidental but Vika doubts. At every turn in both investigations, Riske sees the number of people he can trust narrowing, as the two trails inevitably become one. Reich's solid tradecraft and nonstop action are humanized by the hint of a relationship of the heart and by the presence of Vika's 12-year-old son, who becomes a skilfully played pawn. A stylish international thriller.--Michele Leber Copyright 2010 Booklist

Kirkus Book Review

Simon Riske returns for another car-studded adventure.Riske is a restorer of high-end automobilesFerraris, Bugattis, that sort of thingwho moonlights as a problem-solver to the wealthy, and this second caper (The Take, 2018) takes him to southern France and Monaco in the service of Toby Stonewood, managing partner of the Casino de Monte-Carlo. Toby has been losing money, millions of dollars, from his casino, and he wants Riske to try to uncover how he is being cheated and who is doing it. Riske is well-qualified to undertake this assignment, having spent his younger years with the Corsican mob and being familiar with the ways of gangsters. His cover will be that he is to take part in the Concours d'lgance scheduled there and drive in a time trial. When fate drops a Ferrari Daytona in his figurative lap, Riske is off to the races. After minor complications on French highways, Riske arrives in Monte Carlo and quickly identifies the individuals involved in the casino scam. In addition, he makes the acquaintance of Vika, a particularly compelling woman, and allows himself to become involved in her problems. Vika's mother has recently died in an automobile accidentthe authorities rule it suicide, but Vika knows that cannot be correct, because her mother had poor vision and rarely drove at all and never at night. Further, Vika's mother left Vika a disturbing voicemail that suggests she felt herself to be in some danger. Riske and Vika meet circumstantially, and Riske helps Vika try to sort out what really happened. After Vika is threatened, then assaulted, Riske intervenes and learns she is in fact a princess and also that her assailants are members of the same Bosnian gang that is bleeding the casino. Unraveling the connection, rescuing the princess, and driving fast cars exceedingly well keep Riske busy. Falling in love, even with a princess, seems a little dclass for Simon Riske, whose loner identity was molded in a French prison, but Vika seems a pretty nice girl, and she's worth billions.Monaco, fast cars, rich women, bad Bosnianswhat more is there? Copyright Kirkus Reviews, used with permission.