This was during a war, though it was difficult for any of them to remember which one.

Occasionally one of the dead, someone who had just completed the crossing, would mistake the city for heaven. It was a misunderstanding that never persisted for long. What kind of heaven had the blasting sound of garbage trucks in the morning, and chewing gum on the pavement, and the smell of fish rotting by the river? What kind of hell, for that matter, had bakeries and dogwood trees and perfect blue days that made the hairs on the back of your neck rise on end? No, the city was not heaven, and it was not hell, and it certainly was not the world. It stood to reason, then, that it had to be something else. More and more people came to adopt the theory that it was an extension of life itself – a sort of outer room – and that they would remain there only so long as they endured in living memory. When the last person who had actually known them died, they would pass over into whatever came next. It was true that most of the city's occupants went away after sixty or seventy years, and while this did not prove the theory, it certainly served to nourish it. There were stories of men and women who had been in the city much longer, for centuries and more, but there were always such stories, in every time and place, and who knew whether to believe them?

Every neighborhood had its gathering spot, a place where people could come together to trade news of the other world. There was the colonnade in the monument district, and the One and Only Tavern in the warehouse district, and right next to the greenhouse, in the center of the conservatory district, was Andrei Kalatozov's Russian Tea Room. Kalatozov poured the tea he brewed from a brass samovar into small porcelain cups that he served on polished wooden platters. His wife and daughter had died a few weeks before he did, in an accident involving a land mine they had rooted up out of the family garden. He was watching through the kitchen window when it happened. His wife's spade struck a jagged hunk of metal, so cankered with rust from its century underground that he did not realize what it was until it exploded. Two weeks later, when he put the razor to his throat, it was with the hope that he would be reunited with his family in heaven. And, sure enough, there they were – his wife and daughter – smiling and taking coats at the door of the tea room. Kalatozov watched them as he sliced a lemon into wedges and arranged the wedges on a saucer. He was the happiest man in the room – the happiest man in any room. The city may not have been heaven, but it was heaven enough for him. Morning to evening, he listened to his customers as they shared the latest news about the war. The Americans and the Middle East had resumed hostilities, as had China and Spain and Australia and the Netherlands. Brazil was developing another mutagenic virus, one that would resist the latest antitoxins. Or maybe it was Italy. Or maybe Indonesia. There were so many rumors that it was hard to know for sure.

Now and then someone who had died only a day or two before would happen into one of the centers of communication – the tavern or the tea room, the river market or the colonnade – and the legions of the dead would mass around him, shouldering and jostling him for information. It was always the same: "Where did you live?" "Do you know anything about Central America?" "Is it true what they're saying about the ice caps?" "I'm trying to find out about my cousin. He lived in Arizona. His name was Lewis Zeigler, spelled L-e-w-i-s…" "What's happening with the situation along the African coast – do you know, do you know?" "Anything you can tell us, please, anything at all."

Kiran Patel had sold beads to tourists in the Bombay hotel district for most of a century. She said that there were fewer and fewer travelers to her part of the world, but that this hardly mattered, since there was less and less of her part of the world for them to see. The ivory beads she had peddled as a young woman had become scarce, then rare, then finally unobtainable. The only remaining elephants were caged away in the zoos of other countries. In the years just before she died, the "genuine ivory beads" she sold were actually a cream-colored plastic made in batches of ten thousand in Korean factories. This, too, hardly mattered. The tourists who stopped at her kiosk could never detect the difference.

Jeffrey Fallon, sixteen and from Park Falls, Wisconsin, said that the fighting hadn't spread in from the coasts yet, but that the germs had, and he was living proof. "Or not living, maybe, but still proof," he corrected himself. The bad guys used to be Pakistan, and then they were Argentina and Turkey, and after that he had lost track. "What do you want me to tell you?" he asked, shrugging his shoulders. "Mostly I just miss my girlfriend." Her name was Tracey Tipton, and she did this thing with his earlobes and the notched edge of her front teeth that made his entire body go taut and buzz like a guitar string. He had never given his ear-lobes a second thought until the day she took them between her lips, but now that he was dead he thought of nothing else. Who would have figured?

The man who spent hours riding up and down the escalators in the Ginza Street Shopping Mall would not give his name. When people asked him what he remembered about the time before he died, he would only nod vigorously, clap his hands together, and say, "Boom!," making a gesture like falling confetti with his fingertips.

The great steel-and-polymer buildings at the heart of the city, with their shining glass windows reflecting every gap between every cloud in the sky, gave way after a few hundred blocks to buildings of stone and brick and wood. The change was so gradual, though, and the streets so full of motion, that you could walk for hours before you realized that the architecture had transformed itself around you. The sidewalks were lined with movie theaters, gymnasiums, hardware stores, karaoke bars, basketball courts, and falafel stands. There were libraries and tobacconists. There were lingerie shops and dry cleaners. There were hundreds of churches in the city – hundreds, in fact, in every district: pagodas, mosques, chapels, and synagogues. They stood sandwiched between vegetable markets and video rental stores, sending their crosses, domes, and minarets high into the air. Some of the dead, it was true, threw aside their old religions, disgusted that the afterlife, this so-called great beyond, was not what their lifetimes of worship had promised them. But for every person who lost his faith, there was someone else who held fast to it, and someone else again who adopted it. The simple truth was that nobody knew what would happen to them after their time in the city came to an end, and just because you had died without meeting your God was no reason to assume that you wouldn't one day.

This was the philosophy of Jose Tamayo, who offered himself once a week as a custodian to the Church of the Sacred Heart. Every Sunday, he waited by the west door until the final service was over and the crowd had dissolved back into the city, and then he swept the tile floor, polished the pews and the altar, and vacuumed the cushions by the Communion rail. When he was finished, he climbed carefully down the seventeen steps in front of the building, where the blind man stood talking about his journey through the desert, and made his way across the street to his apartment. He had damaged his knee once during a soccer match, and ever since then he felt a tiny exploding star of pain above the joint whenever he extended his leg. The injury had not gone away, even after the crossing, and he did not like to walk too far on the leg. This was why he had chosen to work for the Church of the Sacred Heart: it was the closest one he could find. He had, in fact, been raised a Methodist, in the only non-Catholic congregation in Juan Tula. He frequently thought of the time he stole a six-pack of soda from the church storage closet with the boys in his Sunday school class. They had heard the teacher coming and shut the door, and a thin ray of light had come slanting through the jamb, illuminating the handle of a cart filled with folding chairs – forty or fifty of them, stacked together in a long, tight interdigitation. What Jose remembered was staring at this cart and listening to his teacher's footsteps as the bubbles of soda played over the surface of his tongue, sparking and collapsing against the roof of his mouth.