1 The engineering office of the Kayak Software Corporation was murmurous. The collapsible walls that divided two of the conference rooms had just been moved aside, opening a theater barely large enough to hold the voices and the hundred bodies crowding in. Paul English stood behind a table, facing them. He was tall, about six foot two, and no longer thin, though he didn''t look fat, just big. He had a prominent jaw and a large face that in repose sometimes made one think of raptors, beaked with staring eyes. He still had a boyish quality as well, along with all his hair--­dark with hints of Irish red, parted in the middle and curving slightly upward to either side, like water rising from a fountain. It was November 2012. It had been more than thirty years since Paul had taken Catholic Communion, and more than twenty since his last fistfight.

The skinny kid with a hot temper and an attitude now practiced meditation. Traces of a Boston working-­class accent still surfaced now and then--­"cahn''t" for "can''t," drawr" for "draw," "remembah." And he was still at risk for dropping what his assistant called "f-­bombs" in polite company. But these were like the fragments of a memory, buried under decades of experience and the transformations of success. Paul had joined the world of software engineering some thirty years before, at a time when computers and software programs were becoming pervasive--­an underlying part of everything, it seemed, and the source of a great deal of new commerce. It was the era that saw the rise of the personal computer, the Internet, the World Wide Web, the smartphone. An era with its own American success story, the story of the software entrepreneur, which begins in a garage instead of a log cabin. Capitalism had long depended on people with the ambition and daring--­not to say greed and recklessness--­to start their own companies.

But lately, entrepreneurship had become a freshly exalted pursuit. It was a church, and Paul was now one of its bishops. He was forty-­nine. The crowd standing before him in the conference room was on average decades younger. Like most of them, he had been a computer programmer and by his own account uncomfortable in many social settings--­or, as he put it, "shy." One engineer out there in the crowd remembered knowing Paul when they were both much younger, then seeing him again after losing touch for several years. "He seemed different," the engineer said. "He looked different, less nerdy.

He seemed more cool." Paul had worked at creating that kind of impression. At various times over the past ten years, for instance, he had asked fashion-­conscious women friends to advise him on his wardrobe. He didn''t feel that he had shed all his "shyness," but in this setting, anyway, he was a paragon of savoir faire. He had natural assets--­his size, his prominent jaw, his hair. And here, of course, he was the boss. When Paul was fired up, he spoke hyperbolically and very fast, dropping the g''s at the ends of words, eliding phrases so that they sounded like one word. But today his performance was muted.

When the voices in the room had quieted, he said, in an offhand tone, which seemed strangely at odds with the message: "So I have a big announcement about the company that I want to tell you. We''ve actually agreed to merge with Priceline." The crowd turned into doves. "Ooooo," they said. Priceline was a large holding company of online travel agencies, and Kayak was a small and unusual but very profitable travel site. Until recently it had done no booking. Rather, it was a comprehensive search engine for travel, often described as "a Google" for finding flights and hotels and rental cars. Paul and a young businessman named Steve Hafner had ­founded Kayak nine years ago, in 2004.

Since then, many companies had offered to buy them out. But, Paul told the room, Priceline''s offer was the only one with the right ingredients. First of all, the purchase price. "It''s a one-­point-­eight-­billion-­dollar transaction," said Paul. He made the translation: Kayak''s stock was now worth $40 a share, $14 more than when the company had gone public four months ago, and $10 more than the current price. Paul didn''t say this, but about half of the people on his team owned stock now worth at least $1 million, and some owned considerably more. Paul''s was the largest take, some $120 million. He didn''t dwell on the money.

Many of the newer faces out there in front of him owned little or no stock. And Kayak''s lawyers had warned him not to say too much, lest he give ammunition to the enemy lawyers who specialize in filing suits over the sales of big companies. Nuisance suits and regulatory agencies would probably delay the official closing of the deal, Paul said. In the meantime, things would go on here at Kayak just as usual. And not only in the meantime. This deal, Paul said, would put Kayak in position to become the strongest travel company in the United States and maybe even internationally. Priceline was rich and powerful. Its market capitalization was $32 billion.

And--­this was the most important thing, along with the sale price--­it had a history of letting its subsidiaries run with complete independence. He and his co-founder, Steve Hafner, had never wanted to work for anyone else, and this deal would preserve both their autonomy and the team''s. "And I think we have a great team here. It''s our team, it''s our culture, we hire and fire as we want." There would be no layoffs. Kayak''s managers wouldn''t even have to attend regular meetings at Priceline. "I''m still here and signed up," Paul said. "Steve is still here and signed up.

" He spoke these last words in a tone so different from his usual exuberance it made you wonder if he believed them himself. He didn''t seem unhappy about the news he''d delivered--­that Kayak, their creation, was now owned by a huge corporation--­but he didn''t seem in a mood to celebrate either. Evening comes early in New England''s November. The windows in the office were darkening by the time the meeting ended. Many of Paul''s team, it appeared, couldn''t wait to take the good news home. The team''s most senior engineer had brought in a five-­hundred-­dollar bottle of Scotch, and several colleagues lingered in the aisles beside their desks, passing the bottle around. Paul sat at his computer, his broad back slightly hunched as he wrote "thank you" again and again to the congratulatory emails filling his screen. 2 Paul had situated Kayak''s engineering office in the town of Concord, Massachusetts, just a few miles from the Old North Bridge, where the Revolutionary War began.

But the immediate environs were a suburban office park, the kind of place you imagine being torn down even while it is being built. Paul almost always went in the back way, across a parking lot, into a brick building, up two flights of stairs, and through a gray metal door. Business matters were handled by Steve Hafner in an office in Connecticut. The engineering office was Paul''s creation and domain. It occupied two floors, all but identical and connected by a broad stairway. Paul and his architect had designed both floors in the open-­room, tidy-­industrial style: no private offices; conference rooms with glass walls; heating ducts and pipes left exposed in the high ceilings; everything gray or white with splashes of orange here and there. Most of the floors were filled with gray metal desks, arranged in complex, adjoining geometries. About a hundred people sat at them, in ergonomic office chairs, in front of large-­screen, late-model iMac computers.

They could have been mistaken for a class of high school seniors, with a lot of thirty-­ and forty-­year-­old faculty mixed in. Only one was African American. There were many Asian faces and East Indian faces. Collectively, Paul''s crew spoke twenty-­one different languages. There was a smattering of women, three of them managers of teams and fourteen others carrying the title of engineer--­a large percentage for a software company. The women were all better dressed than the men, who were a motley-­looking bunch. Jeans and T-­shirts predominated. Two engineers wore shorts and flip-­flops in all seasons.

There were shaved heads, beards, a ponytail, a funny hat with earmuffs. One fellow wore his pants too high for fashion anywhere outside a nursing home. Some were thin, and pale as the winter light from their computer screens. Most were programmers. Looking across the sea of desks, Paul could pick out several dozen whom he affectionately described as odd--­"on the spectrum somewhere." He used the term loosely and with fellow feeling. He himself had been subject to a diagnosis: In his twenties, as a young programmer, he had been told that he suffered from "bipolar disorder." None of the young engineers at Kayak knew this, but the condition still loomed over him, and sometimes descended upon him.

What his team did know about their boss was that he could seem like a force field of energy, and many if not all were drawn to that energy and lifted by it. At the same time, Paul had made this office into something like a bastion against the mad, work-­all-­night ethos that he had reveled in back in his own coding days--­days of hundred-­hour weeks. Kayak engineering was almost always empty on evenings and weekends. One new programmer who hadn''t known any better and worked there all night had been told, when found out in the morning, "Well, okay. But go home soon." Paul had arranged various amenities for his team: modernist paintings, which hung near the sofa where visitors sometimes awaited appointments; a kitchen with free drinks and snacks; two coffee bars with expensive espresso makers; a rec room with a fo.