Rob padded through. The bedroom shutters were squeaking in the summer breeze. Christine was still asleep, her dark hair sprayed across the Egyptian cotton pillowslip. He crossed the parquet floor, barefoot, threw on his clothes and boots, and went quietly downstairs.

Isobel was on the phone. She smiled and waved at Rob and gestured him to the kitchen, where Andrea the maid was making coffee. Rob pulled a chair from under the kitchen table, and thanked the maid for his coffee. And then he sat there, absentmindedly, but happily, staring out of the wide-open kitchen door at the roses and the azaleas and the bougainvillea of the garden.

Ezekiel the cat-‘Ezzy’, as Isobel called her-was chasing a butterfly around the kitchen floor. Rob teased the cat for a few idle minutes. Then he sat back and picked up a newspaper, a day old Financial Times, and read about some Kurdish suicide bombers in Ankara.

He set the paper down again. He didn’t want to know about any of this. He didn’t want to hear about violence or danger or politics. He wanted this idyll to persist; he wanted to stay here with Christine for ever, and bring Lizzie here, too.

But the idyll could not last: Steve his editor was making impatient noises. He either wanted the story done or Rob on another assignment. Rob had filed a couple of Turkish news items to keep things cool back at the office, but everyone knew that this state of grace was temporary.

Rob stepped into the garden and gazed out to sea. There was another alternative. He could just give up his job. Stay here with Christine. Charter a boat, hire it out to tourists. Become a squid fisherman like the Greeks on Burgazada. Join the Armenian café owners in Yassiada. Potter about Isobel’s garden. Just give everything up, and live out his days in the sun. And somehow he could bring Lizzie here too. With his daughter here, laughing on the beach, he would be surrounded by the women he loved, and life would be perfect…

And now he sighed and smiled at his own fond delusions. Love was addling his brain. He had a job, he needed money, he had to be practical.

Rob watched a catamaran in the distance. The line of its white sail looked like a swan as it crossed the stretch of water.

A noise disturbed his reverie. Rob turned, and there was Isobel coming out of the kitchen.

‘I’ve just had the most intriguing phone call from an old friend at Cambridge. Professor Hugo De Savary. Have you heard of him?’

‘No…’

‘Writes a lot. Does TV shows. But he’s a very fine scholar nonetheless. Christine knows him. I think she did a term of his lectures at King’s. In fact I think they were friends…’ Isobel tilted a smile. ‘Where is Christine anyway?’

‘Still fast asleep.’

‘Ah, young love!’ She took Rob’s arm. ‘Let’s go down to the beach. I’ll tell you what Hugo said.’

The beach was rocky and small, but pretty; and almost completely isolated. They sat on a bench of rock and she told him about De Savary’s phone call. The Cambridge historian had explained to Isobel everything he had learned from the police, and added everything he surmised himself about the gruesome murders across Britain. The gang of killers. The connection with the Hellfire Club and the link of human sacrifice in the murders.

‘Why did De Savary ring you?’

‘We’re old friends. I was at Cambridge too, remember.’

‘Yes, but what I mean is, how does this connect with everything we’ve discovered?’

‘Hugo knows I am something of an expert on Turkish and Sumerian antiquity, on ancient religions of the Near East. Such as the Yezidi. He was asking my opinion on a theory. Connected with them. A strange little coincidence. Or maybe not.’ She paused. ‘Hugo believes this gang, the killers, are looking for something closely associated with the Hellfire Club.’

‘Right. I understand that-they are digging up places associated with the club. But what are they looking for? And where do the Yez fit in?’

‘It’s very speculative. Hugo hasn’t even told the police. But he thinks it might be connected with the Black Book. That’s what the gang are pursuing, possibly…’

‘The Black Book? Explain?’

Isobel ran through the story of Jerusalem Whaley: as a friend of Hugo De Savary she’d heard lots of juicy stories about the Hellfire Club. Endless stories of depravity. ‘When he came back from the Holy Land, Thomas Whaley, or Jerusalem Whaley as he was thereafter known, brought with him a cache. A box. A hoard of some kind…’

‘What was it?’

‘Your guess is nearly as good as mine. But we do know he prized his find hugely, believed he’d proved a theory. He called it his “great evidence” in his many letters to friends. Supposedly he was given these materials by an old Yezidi priest. The Yezidi have a caste of priests, singing priests who hand down the oral tradition of the Yezidi. Because there isn’t much of a literary tradition.’

‘And he met with one of these priests, in Jerusalem? Who gave him something?’

‘Presumably. We can’t be sure because Whaley’s memoirs are irritatingly vague. But some scholars think it might be the Black Book of the Yezidi. The sacred book of the Angelicans.’

‘They have a Bible?’

‘Not any more. But their oral traditions say there was, once, a great body of sacred and mystical writing that embodied Yezidi myths and beliefs. Contemporary legends also say that the only copy was taken by an Englishman hundreds of years ago. Might some exiled priest have given the Black Book to Whaley? For safe keeping? The Yezidi have always felt embattled. They might have wanted to preserve their most precious object somewhere safe. Like faraway England. Buck Whaley certainly brought something remarkable with him on his return from the Levant. Moreover, this item, whatever it was, eventually left him a broken man.’

‘OK. So where is it now? The Black Book? If that’s what it is?’

‘Disappeared. Possibly destroyed. Possibly hidden.’

Rob’s thoughts started to race. He looked into the older woman’s serene grey eyes. Then he said: ’How can we find out what the gang are really looking for? How can we investigate this link to the Yezidi?’

‘Lalesh,’ said Isobel. ‘That’s the only place you could get real answers. The sacred capital of the Yezidi. Lalesh.’

Rob felt a shiver of disquiet. He knew he had to go to this place, Lalesh: to get answers, to finish the story. Steve was pressuring him to do the second and concluding article, and to write it properly Rob needed to tie up the straying ends: to find out about this ‘Black Book’.

But Rob also knew where Lalesh was. He’d heard of it before, from other journalists. It had featured in the news, in recent years, more than once. For all the wrong reasons.

‘I know Lalesh, he said. ‘That’s in Kurdistan isn’t it? South of the border?’

Isobel nodded gravely.

‘Yes. It’s in Iraq.’