'Relax, Charles. I wanted to impress the security guard-the thought of being entertained always strikes terror into people. Betty buys and sells property everywhere. In fact, she's thinking of moving into here. A few of the villas are still unsold, along with empty retail units in the shopping mall. If someone could bring the place to life there's a fortune to be made – the people here are well-off.'

'I can see.' I pointed to the cars parked in the driveways.

'More Mercs and BMWs per square foot than in Dusseldorf or Bel Air. Who designed it all?'

'The main developers were a Dutch-German consortium, with a Swiss consultancy handling the 'Human systems side?'

Crawford slapped my knee, laughing cheerfully. 'You've got the jargon, Charles. I know you're going to be happy here.'

'Heaven forbid… happiness looks as if it might infringe the local bye-laws.'

We cruised down the north-south boulevard that ran towards the hub of the complex, a dual carriageway lined with tall palms whose parasols shaded the deserted pathways. Sprinklers turned their rainbows through the scented air, irrigating the crisply-mown grass of the central reservation. Set back within their walled gardens was a line of large villas, deep awnings over their balconies. Only the surveillance cameras moved to follow us. The dusty elephant hide of the palm trunks flickered with the reflected light of swimming pools, but there were no sounds of children playing or of anyone disturbing the almost immaculate calm.

'So many pools,' I commented. 'And no one swimming…'

'They're Zen surfaces, Charles. Breaking them is bad luck. These were the first houses here, built about five years ago. The final plots were filled last week. It may not look it, but the Residencia Costasol is popular.'

'Mostly British?'

'With a few Dutch and French-much the same mix as Estrella de Mar. But this is a different world. Estrella de Mar was built in the 1970s – open access, street festivals, tourists welcome. The Residencia Costasol is pure 1990s. Security rules. Everything is designed around an obsession with crime.'

'I take it there isn't any?'

'None. Absolutely nothing. An illicit thought never disturbs the peace. No tourists, no back-packers or trinket-sellers, and few visitors – the people here have learned that it's a big help to dispense with friends. Be honest, friends can be a problem – gates and front doors need to be unlocked, alarm systems disconnected, and someone else is breathing your air. Besides, they bring in uneasy memories of the outside world. The Residencia Costasol isn't unique. You see these fortified enclaves all over the planet. There are developments like this gearing up along the coast from Calahonda to Marbella and beyond.'

A car overtook us, and the woman driver turned off the boulevard into a tree-lined avenue of slightly smaller villas. Watching her, I realized that I had seen my first resident.

'And what do the people here do all day? Or all night?'

'They do nothing. That's what the Residencia Costasol was designed for.'

'But where are they? We've only seen one car so far.'

'They're here, Charles, they're here. Lying on their sun-loungers and waiting for Paula Hamilton to arrive with a new prescription. When you think of the Costasol complex think of the Sleeping Beauty We left the boulevard and entered one of the dozens of residential avenues. Handsome villas stood behind their wrought-iron gates, terraces reaching to the swimming pools, blue kidneys of undisturbed water. Three-storey apartment houses were briefly visible beyond their drives, where groups of cars waited in the sun, so many dozing metal ruminants. Everywhere satellite dishes cupped the sky like begging bowls.

'There must be hundreds of the dishes,' I commented. 'At least they haven't given up television.'

'They're listening to the sun, Charles. Waiting for a new kind of light.'

The road climbed the shoulder of a landscaped hill. We passed an estate of terraced houses and entered the central plaza of the complex. Car parks surrounded a shopping mall lined with stores and restaurants, and I pointed with surprise to the first pedestrians we had seen, unloading their supermarket trolleys through the tail-doors of their vehicles. To the south of the plaza lay a marina filled with yachts and powerboats, moored together like a mothballed fleet. An access canal led to the open sea, passing below a cantilever bridge that carried the coast road. A handsome clubhouse presided over the marina and its boatyard, but its terrace was deserted, awnings flared over the empty tables. The nearby sports club was equally unpopular, its tennis courts dusty in the sun, the swimming pool drained and forgotten.

A supermarket stood inside the entrance to the shopping mall, next to a beauty salon with shuttered doors and windows. Crawford parked near a sports equipment store filled with exercycles and weightlifting contraptions, computerized heart monitors and respiration counters, arranged in a welcoming if steely tableau.

'Clink, clank, think…' I murmured. 'It looks like a family group of robot visitors.'

'Or a user-friendly torture chamber.' Crawford stepped from the car. 'Let's stroll, Charles. You need to feel the place at first-hand He fixed his aviator glasses over his eyes and glanced around the car park, counting the surveillance cameras as if calculating the best getaway route. The silence of the Residencia Costasol already seemed to dull his reflexes, and he began to practise his forehand and cross-court drives, feet springing as he waited to return an imaginary service.

'Over here-if I'm right, there are signs of life…' He beckoned me towards the liquor store next to the supermarket, where a dozen customers hovered in the air-conditioned aisles and the Spanish check-out girls sat at their tills like marooned queens. The wall-to-ceiling display of wines, spirits and liqueurs was almost cathedral in its vastness, and a primitive cortical life seemed to flicker as the residents and their wives fitfully scanned the prices and vintages.

'The Residencia Costasol's cultural heart,' Crawford informed me. 'At least they still have the energy to drink… the elbow reflex must be the last to go.'

He stared at the silent aisles, working out his challenge to this eventless world. We left the liquor store and paused by a Thai restaurant, whose empty tables receded through a shadow world of flock wallpaper and gilded elephants. Next to it was an untenanted retail unit, a concrete vault like an abandoned segment of space-time. Crawford stepped through the litter of cigarette packets and lottery tickets, and read a faded notice announcing an over-fifties dance at the Costasol social centre.

Without waiting for me, he walked through the unit and set off across the car park to the terraced villas that lined the western side of the plaza. Gravel gardens stocked with cactus plants and pallid succulents led to the shaded terraces, where the beach furniture waited like the armatures of the human beings who would occupy them that evening.

'Charles, be discreet but look in there. You can see what we're up against…'

Shielding my eyes from the sunlight, I gazed into one of the darkened lounges. A three-dimensional replica of a painting by Edward Hopper was visible below the awning. The residents, two middle-aged men and a woman in her thirties, sat in the silent room, their faces lit by the trembling glow of a television screen. No expression touched their eyes, as if the dim shadows on the hessian walls around them had long become a satisfactory substitute for thought.

'They're watching TV with the sound turned down,' I told Crawford as we strolled along the terrace, past similar groups isolated in their capsules. 'What happened to them? They're like a race from some dark planet who find the light here too strong to bear.'