This is book 39 of the "Stone Barrington" series.

This note contains spoilers for the book.

Stone gets a new client who just won the biggest Power Ball lottery ever. The client's take (1/3) is 612 million dollars.

So of course he instantly buys the best apartment in New York City, and a house in Santa Fey, and a jet airplane. Stone is obviously the right guy to advise him on this.

He's an assistant master at Eton; while American, he was raised in England. And he's donating ten million each to Eton and his college in Oxford. Stone's advice on tax consequences there is apparently worth his entire fee—but somehow the question of tax on the lottery winning never comes up.

The brother of the personal shopper he gets assigned at Ralph Lauren is just out of prison, and has a friend who seems committed to getting back into prison as soon as possible. This leads to intrusions at Stone's place as well as the client's, and yet more money spent with Strategic Services.

Stone carefully advises the client not to get a gun even in New Mexico, and if he does not to bring it to New York. But never mentions that he has a New York carry permit himself, and has defended himself with his gun many times. (At least some of Stone's detailed advice is good; you really ought to have quite a bit of training and practice before keeping a gun for self-defense, and there are criminal and civil legal risks to worry about even if your use of the gun is pretty clearly legal, especially if you have a lot of money that can be gone after in a civil suit.)

Basically, this is straight-forward "instantly rich" pornography.