The first book in the Rob Ryan and Cassie Maddox series, 2007

Picture a summer stolen whole from some coming-of-age film set in small-town 1950s. This is none of Ireland 's subtle seasons mixed for a connoisseur's palate, watercolor nuances within a pinch-sized range of cloud and soft rain; this is summer full-throated and extravagant in a hot pure silkscreen blue. This summer explodes on your tongue tasting of chewed blades of long grass, your own clean sweat, Marie biscuits with butter squirting through the holes and shaken bottles of red lemonade picnicked in tree houses. It tingles on your skin with BMX wind in your face, ladybug feet up your arm; it packs every breath full of mown grass and billowing wash lines; it chimes and fountains with birdcalls, bees, leaves and football-bounces and skipping-chants, One! two! three! This summer will never end. It starts every day with a shower of Mr. Whippy notes and your best friend's knock at the door, finishes it with long slow twilight and mothers silhouetted in doorways calling you to come in, through the bats shrilling among the black lace trees. This is Everysummer decked in all its best glory.

Picture an orderly little maze of houses on a hill, only a few miles from Dublin. Someday, the government declared, this will be a buzzing marvel of suburban vitality, a plan-perfect solution to overcrowding and poverty and every urban ill; for now it is a few handfuls of cloned semi-detacheds, still new enough to look startled and gauche on their hillside. While the government rhapsodized about McDonald's and multiscreens, a few young families-escaping from the tenements and outdoor toilets that went unmentioned in 1970s Ireland, or dreaming big back gardens and hopscotch roads for their children, or just buying as close to home as a teacher's or bus driver's salary would let them-packed rubbish bags and bumped along a two-track path, grass and daisies growing down the middle, to their mint-new start.

That was ten years ago, and the vague strobe-light dazzle of chain stores and community centers conjured up under "infrastructure" has so far failed to materialize (minor politicians occasionally bellow in the Dáil, unreported, about shady land deals). Farmers still pasture cows across the road, and night flicks on only a sparse constellation of lights on the neighboring hillsides; behind the estate, where the someday plans show the shopping center and the neat little park, spreads a square mile and who knows how many centuries of wood.

Move closer, follow the three children scrambling over the thin membrane of brick and mortar that holds the wood back from the semi-ds. Their bodies have the perfect economy of latency; they are streamlined and unselfconscious, pared to light flying machines. White tattoos-lightning bolt, star, A-flash where they cut Band-Aids into shapes and let the sun brown around them. A flag of white-blond hair flies out: toehold, knee on the wall, up and over and gone.

The wood is all flicker and murmur and illusion. Its silence is a pointillist conspiracy of a million tiny noises-rustles, flurries, nameless truncated shrieks; its emptiness teems with secret life, scurrying just beyond the corner of your eye. Careful: bees zip in and out of cracks in the leaning oak; stop to turn any stone and strange larvae will wriggle irritably, while an earnest thread of ants twines up your ankle. In the ruined tower, someone's abandoned stronghold, nettles thick as your wrist seize between the stones, and at dawn rabbits bring their kittens out from the foundations to play on ancient graves.

These three children own the summer. They know the wood as surely as they know the microlandscapes of their own grazed knees; put them down blindfolded in any dell or clearing and they could find their way out without putting a foot wrong. This is their territory, and they rule it wild and lordly as young animals; they scramble through its trees and hide-and-seek in its hollows all the endless day long, and all night in their dreams.

They are running into legend, into sleepover stories and nightmares parents never hear. Down the faint lost paths you would never find alone, skidding round the tumbled stone walls, they stream calls and shoelaces behind them like comet-trails. And who is it waiting on the riverbank with his hands in the willow branches, whose laughter tumbles swaying from a branch high above, whose is the face in the undergrowth in the corner of your eye, built of light and leaf-shadow, there and gone in a blink?

These children will not be coming of age, this or any other summer. This August will not ask them to find hidden reserves of strength and courage as they confront the complexity of the adult world and come away sadder and wiser and bonded for life. This summer has other requirements for them.

What I warn you to remember is that I am a detective. Our relationship with truth is fundamental but cracked, refracting confusingly like fragmented glass. It is the core of our careers, the endgame of every move we make, and we pursue it with strategies painstakingly constructed of lies and concealment and every variation on deception. The truth is the most desirable woman in the world and we are the most jealous lovers, reflexively denying anyone else the slightest glimpse of her. We betray her routinely, spending hours and days stupor-deep in lies, and then turn back to her holding out the lover's ultimate Möbius strip: But I only did it because I love you so much.

I have a pretty knack for imagery, especially the cheap, facile kind. Don't let me fool you into seeing us as a bunch of parfit gentil knights galloping off in doublets after Lady Truth on her white palfrey. What we do is crude, crass and nasty. A girl gives her boyfriend an alibi for the evening when we suspect him of robbing a north-side Centra and stabbing the clerk. I flirt with her at first, telling her I can see why he would want to stay home when he's got her; she is peroxided and greasy, with the flat, stunted features of generations of malnutrition, and privately I am thinking that if I were her boyfriend I would be relieved to trade her even for a hairy cellmate named Razor. Then I tell her we've found marked bills from the till in his classy white tracksuit bottoms, and he's claiming that she went out that evening and gave them to him when she got back.

I do it so convincingly, with such delicate crosshatching of discomfort and compassion at her man's betrayal, that finally her faith in four shared years disintegrates like a sand castle and through tears and snot, while her man sits with my partner in the next interview room saying nothing except "Fuck off, I was home with Jackie," she tells me everything from the time he left the house to the details of his sexual shortcomings. Then I pat her gently on the shoulder and give her a tissue and a cup of tea, and a statement sheet.

This is my job, and you don't go into it-or, if you do, you don't last-without some natural affinity for its priorities and demands. What I am telling you, before you begin my story, is this-two things: I crave truth. And I lie.