Five minutes after leaving the airport, Carver stopped at a roadside pizza parlor and ordered a pizza for takeout. While it was being cooked, he went looking for the bathroom, carrying his pack with him. There were two individual cubicles, each with a toilet and basin. He made his way to the nearest one and got out the gun he’d specified, a SIG-Sauer P226 pistol, with a Colt/Browning short-recoil mechanism and no safety catch. There were twelve Cor-Bon 9mm 115 grain +P Jacketed Hollow Points in the magazine.

The SIG was the British Special Forces’ pistol of choice for antiterrorist and undercover work. Carver had used it on countless military operations and had stayed with it ever since. Now, as always, he stripped his gun, checked it, and reassembled it. The whole process took him less than a minute. On one level, it was a basic precaution to make sure the weapon functioned. But it was also a ritual that helped him focus on what was to come, like an athlete moving into the zone, getting his game face on.

Next, Carver plugged the washbasin. He reached into his backpack and took out the can of 3-in-1, and poured its contents into the basin. Then he reached in again, removing a small brick of what looked like gray modeling clay. It was C4 explosive – plastic. He put the C4 into the basin and started kneading it, mixing the oil and plastic together, like a baker working his dough. He ended up with a sticky, pliable putty that itself was completely safe. It could be molded into any shape and stuck to any surface. You could shove it in small plastic bags – just as Carver now started to do, dividing it into four equal portions. You could hit it, burn it, even shoot it full of bullets and nothing would happen. But put a fuse, a blasting cap, or a timer into it and suddenly you had a bomb.

Once the bags of explosive putty had been stashed in Carver’s backpack, he got out the cleanser and poured it all over the basin, removing any traces of oil or C4. He set the taps on full blast to rinse it all away and threw the bottle in the trash. There was still a slight smell of oil and plastic in the air, so Carver sprayed air freshener around the tiny room, then junked that can too. A man was waiting outside as he left. Carver shrugged his shoulders apologetically, held his nose, and murmured, “Pardon.”

He collected his pizza and ate half of it in the parking lot. The rest he threw away in a Dumpster. He kept the box, mounted the Honda, and headed south into Paris.

The apartment was on the Ile Saint-Louis, one of the two islands in the middle of the river Seine that sit virtually at the dead center of the city. The street outside was filled with tourists enjoying the island’s relaxed village atmosphere and the warm, late-summer evening. They wandered along, taking their time, stopping to look in shop windows or check out the menus of the restaurants and cafés dotted along the sidewalks.

Carver parked his bike and got off, still wearing his helmet, carrying the pizza box. Anyone who spared him a passing glance would just see a delivery man. Only a very sharp eye would spot that he was wearing a pair of latex gloves as he walked up to the front door of the eighteenth-century building where Ramzi Narwaz entertained his lovers. A few seconds’ work with a set of skeleton keys got him in.

He looked around the ground-floor lobby, familiarizing himself with its layout, then walked down it to a back door that led into a bare courtyard with a row of trash bins down one wall. Directly opposite him an archway opened out onto the street at the back of the building. Relieved to see that there was more than one way out, Carver got rid of the pizza box and went back into the building.

The apartment was on the top floor, up several flights of stairs. Once again the locks were no barrier. Carver stepped into a central hallway with a floor-to-ceiling window at its far end. It was almost dark outside, but the streetlights gave off enough illumination to enable Carver to see his way around.

The moment the door was opened, the burglar alarm warning started beeping, set off by a standard magnetic door contact. Carver had thirty seconds before the alarm went off. A small control pad was fixed to the wall immediately to the left of the door, just as the plans he’d been sent had promised. The code too was exactly as Max had said. The beeping stopped.

Ahead of him, leading off the hall, there was a short passage, lined with cupboards. The left-hand side was broken by a door, which opened onto a tiny kitchenette. Carver turned the other way and opened the cupboard on the right-hand side of the passage. There were a couple of winter coats hanging there. Behind them was the white metal box that contained the heart and brain of the apartment’s alarm system. He gave a satisfied nod, then closed the cupboard door.

At the far end of the passage was a large, open-plan living room. The place was classier than Carver had been expecting, given the kind of man who owned it and what he used it for. There were no flashy glass-and-chrome tables, no mirrored ceilings or semipornographic nudes. Instead, the room had pale walls, with an antique wooden dining table at one end, decorated with a vase of fresh flowers. Beyond it, three large, creamy white sofas were arranged around a Persian rug. Other than that, the floors were bare wood, echoed in the massive, black wooden beams that supported the ceiling. A fireplace was set into the far wall, next to bookshelves that housed a mini hi-fi system, a couple of rows of books, and a small collection of crystal vases, small pots, and miniature sculptures. Two infrared motion detectors blinked at him from opposite corners of the room, there to catch intruders coming in through the windows.

Carver put his pack down in the middle of the floor, extracted the torch, strapped it around his head so that both his hands were free, and took a long, detailed look at the hi-fi. Then he banged his hand against the wall behind it, checking to see that it was a solid, load-bearing structure, and nodded to himself, satisfied.

He returned to the pack and removed the screwdriver, the wire cutters, and three small, oblong plastic cases, each roughly the size and depth of a paperback book, but very slightly curved along their longer sides.

These were M18 Claymore antipersonnel mines, configured for remote detonation. Each consisted of a kilo slab of C4 explosive, around which were wrapped seven hundred tiny steel ballbearings, encased in a polystyrene and fiberglass outer shell.

He lifted down the mini hi-fi, unscrewed the back of the speaker cabinets, opened them up, and cut away the speaker units themselves. Then he placed a Claymore inside each of the empty cabinets, closed them up again, and replaced them exactly as they had been, complete with leads from the amplifier. When they went off, the deadly pellets would be fired in an arc across the room and through the flimsy partition walls that separated it from the kitchenette and the hall. Anyone in their way would be shredded into bite-size chunks. Carver tucked his screwdriver and wire cutters away in his outside thigh pocket and took another look at the finished job.

The switch was undetectable. If Narwaz turned on his hi-fi within a minute of walking into the apartment, he might be suspicious when no sound came from the speakers. But then, if Narwaz came back to the apartment that night, he’d just have survived an assassination attempt. He wouldn’t be in the mood for music.

Carver was working without undue haste, settling into a steady rhythm that would get him out of the apartment as quickly as possible, without rushing into careless mistakes. He picked up the pack and walked from the room, down the passage, and across the hall to the bedroom. Again, the walls were pale, the floors wooden, the window and drapes full length. This time there was just one motion sensor. The bed was the one extravagance in the place, a magnificent piece of Victorian brass, its gleaming rails topped by extravagant swirls of twisted metal.