Dean Koontz - By the Light of the Moon

What Dylan had not been prepared for, what caused his adrenal gland to squirt another dose of epinephrine into his bloodstream, what caused his guts to tweak in a less than pleasant fashion was the doorway in the wall beside the sink, where earlier no door had been. The source of the strange red light lay beyond this postern.

Hesitantly, he crossed the threshold into the bathroom.

Doorway didn't accurately convey the nature of this mysterious opening. It wasn't rectangular, but round, like a hatch in a bulkhead between two compartments in a submarine. Hatch didn't qualify as the mot juste , either, because no architrave surrounded the hole in the wall.

Indeed, the six-foot-diameter opening itself appeared to lack depth, as though it had been painted on the wall. No header, no jamb, no threshold. And yet the scene beyond appeared convincingly three-dimensional: a radiant red tunnel dwindling to a disc of blue light.

Dylan had seen masterpieces of trompe l'oeil in which artists, relying on nothing more than paint and their talent, had created illusions of space and depth that completely deceived the eye. This, however, was not merely a clever painting.

For one thing, the murky red glow from the luminous walls of the tunnel penetrated to the motel bathroom. This queer light glimmered in the vinyl floor, reflected off the mirror – and crawled on his exposed skin.

Furthermore, those tunnel walls ceaselessly turned, as if this were a passage in a carnival funhouse, a sideshow monkey barrel in which to test your balance. Trompe l'oeil painting could produce the illusion of depth, texture, and reality – but it could not provide an illusion of motion.

Jilly stepped into the bathroom beside Dylan.

He placed a restraining hand on her shoulder.

Together they marveled at the tunnel, which appeared to be at least thirty feet long.

Impossible, of course. Another motel unit backed up to this one; plumbing-to-plumbing design saved construction costs. A hole cut in the wall would reveal only another bathroom identical to theirs. Not a tunnel, never a tunnel. There was nothing to bore a tunnel through ; the bathroom had not been built into the side of a mountain.

Nonetheless, a tunnel. He closed his eyes. Opened them. Tunnel. Six feet in diameter. Glowing, revolving.

Welcome to the monkey barrel. Buy a ticket, test your balance.

In fact, someone had already entered the barrel. Silhouetted against a disc of azure light, a man stood at the far end of the passageway.

Dylan had no doubt that the distant figure was Shep. Out there past the terminus of the tunnel, his back to them, Shepherd gazed into the blue beyond.

So if under Dylan the floor seemed to shift, if he felt that he might drop through a hole into a shaft as deep as eternity, this was not an associated effect of the tunnel. This was just a psychological response to the sudden perception that reality, as he'd always known it, was less stable than he had assumed.

Breathing hard, exhaling words in a hot rush, Jilly sought an explanation for the impossible: 'The hell with this, the hell with it, I'm not awake, I can't be awake.'

'You're awake.'

'You're probably part of the dream.'

'This isn't a dream,' he said, sounding shakier than she did.

'Yeah, right, not a dream – that's exactly what you'd say if you were part of the dream.'

He had put a restraining hand on her shoulder not because he feared that she would rush forward into the tunnel, but because he half expected that she would be swept into it against her will. The revolving walls suggested a whirlpool that might inexorably swallow anyone who ventured too close to the mouth of it. Second by second, however, his fear of a cyclone suction receded.

'What's happening,' she asked, 'what is this, what the hell is this?'

Not a whisper of sound issued from the realm beyond the wall. The turning surface of the tunnel looked as though it ought to be emitting a noisy scrape and rumble, or at least the liquid sound of churning magma, but it revolved in absolute silence.

No air escaped the opening, neither a breath of heat nor the faintest cool draft. No scent, either. Only the light.

Dylan moved closer to the portal.

'Don't,' Jilly worried.

At the brink, he tried first to examine the transition point between the bathroom wall and the entrance to the tunnel, but the junction of the two proved to be… fuzzy… a blur that would not resolve into concrete detail no matter how hard he squinted at it. In fact, his hackles rose and his gaze repeatedly slid away from the joint line as though some deep primitive part of him knew that by looking too directly at such a thing, he would risk glimpsing a secret kingdom of fearsome entities behind the veil of this world, beings that operated the machinery of the universe itself, and that such a sight invited instant madness.

When he'd been thirteen, fourteen, he'd read H. P. Lovecraft and thrilled to those macabre tales. Now he couldn't shake the unnerving feeling that Lovecraft had written more truth than fiction.

Abandoning an attempt to examine the point of transition between bathroom and tunnel, he stood at the brink and squinted at a spot on the revolving walls, trying to determine the nature of the material, its solidity. On closer study, the passage seemed to be formed from shining mist, or maybe he was peering along a tunnel of pure energy; this was not unlike a god's-eye view down the funnel of a tornado.

Tentatively, he placed his right hand on the wall beside the mysterious gateway. The painted sheetrock felt slightly warm and gratifyingly normal.

Sliding his hand to the left, across the bathroom wall, toward the opening, he hoped to be able to feel the point of transition from motel to tunnel and to understand how the connection was made. But as his hand slid off the sheetrock and into the apparently open doorway, he detected no details of structure, nothing but a coldness – and also the red light crawling more vigorously than ever across his upraised palm.

'No, don't, no! ' Jilly warned.

'No, what?'

'No, don't go in there.'

'I'm not going in there.'

'You look like you're going in there.'

'Why would I go in there?'

'After Shep.'

'No way am I going in there.'

'You'd jump off a cliff after Shep.'

'I wouldn't jump off a cliff,' he impatiently assured her.

'You'd jump off a cliff,' she insisted. 'Hope to catch him on the way down, hope to carry him down into a haystack. You'd jump, all right.'

He just wanted to test the reality of the scene before him, to confirm that indeed it had true dimension, that it was a gateway and not just a window, an actual entry point to some otherworldly place rather than merely a view of it. Then he would retreat and think over the situation, try to arrive at a logical course of action with which to approach this monumentally illogical development.

Firmly pressing his right hand against the plane where the wall should have been, he discovered no sheetrock underlying the image of the tunnel, encountered no resistance whatsoever. He reached out of the bathroom, into that forbidding other realm, where the air proved to be icy, and where the baleful light squirmed over and around his fingers not like hundreds of ants any longer but like thousands of hard-shell beetles that might strip the flesh from his bones.

If he'd allowed himself to be guided by instinct, he would have withdrawn his hand at once; but he believed that he needed to explore this incredible situation more fully. He reached farther through the gateway, extending his hand in there to the wrist, and although he winced at the bitter cold, was nearly overwhelmed by revulsion at the hideous crawly sensation, he reached in still farther, all the way to his elbow, and then, of course, as instinct might have warned him if he had been listening, the tunnel took him.