Pop Goes the Weasel (novel)

Pop Goes the Weasel (1999) is the fifth novel in the Alex Cross series written by James Patterson.
Plot.
The book begins by introducing the villain, Geoffrey Shafer. He is a well-dressed and wealthy man who lives in Kalorama, Washington, D.C. and drives a Jaguar XJ12. In the beginning, he rushes into oncoming traffic causing a commotion, before a police officer pulls him over and asks him for some identification. This is when the reader finds out he is a British Diplomat who has diplomatic immunity.
As Geoffrey feels he is losing control, he decides to play a fantasy game called the Four Horsemen, in which he takes on the character of Death. As the game begins, he drives to the red light district, picks up a prostitute and e-mails the other Horsemen.
Characters.
The Four Horsemen.
All four of them killed people in their area, but Shafer was more out of control. During their time in Bangkok they all murdered prostitutes.
Critical reception.
Kirkus Reviews said "Pop Goes the Weasel" was a suspenseful novel that hinted towards a sequel.