Of course, there was an upside to becoming the best-known private detective in London. New clients had swarmed to Strike in the aftermath of the trial, so that it had become physically impossible for him and Robin to cover all the jobs themselves. Given that it was advisable for Strike to keep a low profile for a while, he had remained largely office-bound for several months while subcontracted employees—mostly ex-police and military, many from the world of private security—took on the bulk of the work, Strike covering nights and paperwork. After a year of working on as many jobs as the enlarged agency could handle, Strike had managed to give Robin an overdue pay rise, settle the last of his outstanding debts and buy a thirteen-year-old BMW 3 series.

Lucy and his friends assumed that the presence of the car and additional employees meant that Strike had at last achieved a state of prosperous security. In fact, once he had paid the exorbitant costs of garaging the car in central London and met payroll, Strike was left with almost nothing to spend on himself and continued to live in two rooms over the office, cooking on a single-ringed hob.

The administrative demands freelance contractors made and the patchy quality of the men and women available to the agency were a constant headache. Strike had found only one man whom he had kept on semi-permanently: Andy Hutchins, a thin, saturnine ex-policeman ten years older than his new boss, who had come highly recommended by Strike’s friend in the Met, Detective Inspector Eric Wardle. Hutchins had taken early retirement when he had been struck by a sudden bout of near-paralysis of his left leg, followed by a diagnosis of multiple sclerosis. When he had applied for contract work, Hutchins had warned Strike that he might not always be fit; it was, he explained, an unpredictable disease, but he had not relapsed in three years. He followed a special low-fat diet that to Strike sounded positively punitive: no red meat, no cheese, no chocolate, nothing deep-fried. Methodical and patient, Andy could be trusted to get the job done without constant supervision, which was more than could be said for any of Strike’s other hires apart from Robin. It seemed incredible to him, still, that she had walked into his life as a temporary secretary to become his partner and outstanding colleague.

Whether they were still friends, though, was another question.

Two days after Robin and Matthew’s wedding, when the press had driven him out of his flat, while it was still impossible to turn on the TV without hearing his own name, Strike had sought refuge, in spite of invitations from friends and his sister, in a Travelodge near Monument station. There he had attained the solitude and privacy he craved; there he had been free to sleep for hours undisturbed; and there he had downed nine cans of lager and become increasingly desirous of speaking to Robin with each empty can that he threw, with diminishing accuracy, across the room into the bin.

They had had no contact since their hug on the stairs, to which Strike’s thoughts had turned repeatedly in the ensuing days. He was sure that Robin would be going through a hellish time, holed up in Masham while deciding whether to pursue a divorce or an annulment, arranging the sale of their flat while dealing with both press and family fallout. What exactly he was going to say when he reached her, Strike did not know. He only knew that he wanted to hear her voice. It was at this point, drunkenly searching his kit bag, that he discovered that in his sleep-deprived haste to leave his flat, he had not packed a recharging lead for his mobile, which was out of battery. Undeterred, he had dialed directory inquiries and succeeded, after many requests to repeat himself more clearly, in getting connected to Robin’s parents’ house.

Her father had answered.

“Hi, c’n’I speak t’Robinplease?”

“To Robin? I’m afraid she’s on her honeymoon.”

For a muzzy moment or two, Strike had not quite comprehended what he had been told.

“Hello?” Michael Ellacott had said, and then, angrily, “I suppose this is another journalist. My daughter’s abroad and I would like you to stop calling my house.”

Strike had hung up, then continued to drink until he passed out.

His anger and disappointment had lingered for days and were in no way abated by his awareness that many would say that he had no claims upon his employee’s private life. Robin wasn’t the woman he had thought her if she could have got meekly on a plane with the man he mentally referred to as “that twat.” Nevertheless, something close to depression weighed upon him while he sat in his Travelodge with his brand-new recharging lead and more lager, waiting for his name to disappear from the news.

Consciously seeking to distract himself from thoughts of Robin, he had ended his self-imposed isolation by accepting an invitation that he would usually have avoided: dinner with Detective Inspector Eric Wardle, Wardle’s wife April and their friend Coco. Strike knew perfectly well that he was being set up. Coco had previously tried to find out through Wardle whether Strike was single.

She was a small, lithe, very pretty girl with tomato-red hair, a tattoo artist by trade and a part-time burlesque dancer. He ought to have read the danger signs. She was giggly and slightly hysterical even before they started drinking. Strike had taken her to bed in the Travelodge in the same way he had drunk nine cans of Tennent’s.

Coco had taken some shaking loose in the weeks that followed. Strike did not feel good about it, but one advantage of being on the run from the press was that one-night stands found it far harder to track you down.

One year on, Strike had no idea why Robin had chosen to remain with Matthew. He supposed her feelings for her husband ran so deep that she was blind to what he really was. He was in a new relationship himself, now. It had lasted ten months, the longest since he had split up with Charlotte, who had been the only woman whom he had ever contemplated marrying.

The emotional distance between the detective partners had become a simple fact of daily existence. Strike could not fault Robin’s work. She did everything she was told promptly, meticulously and with initiative and ingenuity. Nevertheless, he had noticed a pinched look that had never been there before. He thought her slightly jumpier than usual and, once or twice while parceling out work between his partner and subcontractors, he had caught an uncharacteristic blank, unfocused expression that troubled him. He knew some of the signs of post-traumatic stress disorder and she had now survived two near-fatal attacks. In the immediate aftermath of losing half his leg in Afghanistan, he, too, had experienced dissociation, finding himself suddenly and abruptly removed from his present surroundings to those few seconds of acute foreboding and terror that had preceded the disintegration of the Viking in which he had been sitting, and of his body and military career. He had been left with a deep dislike of being driven by anybody else and, to this day, with dreams of blood and agony that sometimes woke him, bathed in sweat.

However, when he had attempted to discuss Robin’s mental health in the calm, responsible tones of her employer, she had cut him off with a finality and a resentment that he suspected could be traced to the sacking. Thereafter, he had noticed her volunteering for trickier, after-dark assignments and it had been something of a headache to arrange work so that he did not appear to be trying, as in fact he was, to keep her on the safest, most mundane jobs.

They were polite, pleasant and formal with each other, talking about their private lives in the broadest brushstrokes, and then only when necessary. Robin and Matthew had just moved house and Strike had insisted that she take a full week off to do it. Robin had been resistant, but Strike had overruled her. She had taken very little leave all year, he reminded her, in a tone that brooked no argument.