‘Hey, I’ve done a lot of things you don’t know about,’ said Mattias loudly.

Oh, right, thought Adam, but he didn’t dare contradict his friend. Sometimes Mattias liked to play the tough guy, and Adam let him do it. He knew better than to get into that sort of discussion with Mattias.

‘What do you think he’s got inside there?’ Mattias’s eyes were shining as they slowly made their way around the house, looking for a window or a hatch, anything that might allow them access.

‘No idea,’ said Adam, looking over his shoulder anxiously. He was feeling less happy about the situation with each passing second.

‘Maybe some cool Nazi souvenirs. What if he has uniforms and stuff like that?’ There was no mistaking the enthusiasm in Mattias’s voice. Ever since they’d done a class project on the SS, he’d been obsessed, reading everything he could find about World War II and Nazism. Everyone knew that the neighbour down the road was some sort of expert on Germany and the Nazis, so Mattias had felt an irresistible urge to find out what he had in his possession.

‘But maybe he doesn’t keep anything like that in his house,’ Adam attempted to object, even though he knew it was hopeless. ‘Pappa said he was a history teacher before he retired, so he probably just has a lot of books and things like that. It doesn’t mean he has any cool stuff.’

‘We’ll see soon enough.’ Mattias’s eyes flashed triumphantly as he pointed at a window. ‘Look. That window is open a crack.’

Adam noted with dismay that Mattias was right. He’d been quietly hoping that it would turn out to be impossible to get inside the house.

‘We just need something to push up the window with.’ Mattias glanced around. He settled on a window latch that had come off and landed on the ground.

‘Okay, let’s see now.’ Mattias held the latch overhead and poked one end into a corner of the window. The window didn’t budge. ‘Shit! This has to work.’ Sticking out his tongue in concentration, he had another go. It wasn’t easy to hold the latch overhead and apply force at the same time, and he was breathing hard from the effort. Finally he managed to insert the latch another half an inch.

‘They’re going to notice that someone broke in!’ Adam protested weakly, but Mattias didn’t seem to hear him.

‘I’m going to make this fucking window open!’ Sweat rolling down his face, he gave it one last prod, and the window swung up.

‘Yes!’ Mattias clenched his fist in a gesture of victory and then turned in excitement to Adam.

‘Give me a leg-up.’

‘But maybe there’s something we can use to climb up on, a ladder or…’

‘Forget it, just give me a boost, and then I’ll pull you up afterwards.’

Obediently Adam moved close to the wall, lacing his fingers to form a step for Mattias. He winced as Mattias’s shoe dug into the palms of his hands, but he ignored the pain and lifted his friend upwards.

Mattias caught hold of the window ledge and managed to hoist himself so that he could plant first one foot and then the other on the sill. He wrinkled his nose. God, what a smell! The place stank. He moved aside the blind and peered into the room. It looked like it might be a library, but all the blinds were down, so the room was wrapped in shadow.

‘Hey, it smells like shit in here.’ Holding his nose, he turned to look at Adam.

‘Then let’s forget it,’ said Adam with a hopeful glint in his eye.

‘No way! Not now we’re finally in. This is where the fun begins! Here, take my hand.’ Letting go of his nose, he gripped the window ledge with his left hand as he reached out his right to Adam. ‘Come on, you’re not chicken, are you?’

By way of response Adam grabbed his hand, and Mattias began pulling with all his might. For a moment it looked as though he wasn’t going to make it, but then Adam caught hold of the window sill, and Mattias hopped down on to the floor to make room for him. There was a strange crackling sound as he landed. He looked down at the floor. Something covered the surface, but in the dim light he couldn’t tell what it was. Probably just some dried leaves.

‘What the -?’ said Adam as he too jumped down on to the floor. But he couldn’t identify what the crunching sound came from. ‘Shit, it really smells in here,’ he said, looking as if he might gag from the stench.

‘That’s what I told you,’ said Mattias. He was growing accustomed to the smell, and it didn’t bother him as much any more.

‘Let’s see what the old man’s got in here. Pull up the blind.’

‘But what if somebody sees us?’

‘Who’s going to see? Pull up the fucking blind.’

Adam did as he was told. The blind rolled up with a swishing sound, letting light pour into the room.

‘Cool room,’ said Mattias, looking around with awe. All the walls were covered with bookshelves, floor to ceiling. In one corner stood two leather armchairs on either side of a small table. Presiding over the far end of the room was an enormous desk and an old-fashioned chair, turned halfway round so the high back was facing them. Adam took a step closer, but the crunching noise under his feet made him look down again. This time he saw what they were walking on.

‘What the…’ The floor was covered with flies. Disgusting black flies, all of them dead. The windowsill, too, was covered in flies, and without thinking Adam and Mattias both wiped their hands on their trousers.

‘Shit, that’s disgusting.’ Mattias grimaced.

‘Where did all these flies come from?’ Adam stared at the floor in amazement. Then his CSI-indoctrinated brain put two and two together. Dead flies. A revolting stench… He tried to push the thought away, but his eyes were drawn inexorably to the desk chair.

‘Mattias?’

‘What?’ his friend replied, sounding annoyed. He looking for somewhere to put his feet where he wouldn’t be stepping on dead flies.

Adam didn’t answer. Instead he slowly moved towards the chair. He had a feeling that he should turn round, leave the way they’d come, and run until he couldn’t run any more. But curiosity got the better of him, and his feet seemed to move of their own accord, taking him to the chair.

‘Well, what is it?’ Mattias said, but then he fell silent when he saw Adam moving forward, tense and alert.

He was still a half-metre from the chair when he reached out his hand. He noticed that it was shaking. Inch by inch, Adam moved his hand towards the back of the chair. The only sound in the room was the crunching under his feet. The leather of the chair felt cool to his fingertips. He pressed harder, shoving the chair to the left so that it began to rotate. He took a step back. Slowly the chair turned, gradually revealing what it held. Behind him Adam heard Mattias throw up.

The eyes watching his every move were big and moist. Mellberg tried to ignore the animal, but with only partial success. The dog remained practically plastered to his side, looking at him with adoration. Finally Mellberg relented. He pulled out the bottom desk drawer, took out a coconut marshmallow and tossed it on the floor. In two seconds it was gone, and for a moment Mellberg thought the dog was smiling. Pure fantasy, no doubt. At least his fur was clean. Annika had done a good job of shampooing and rinsing him off. Even so, Bertil had found it a bit distasteful to wake up this morning and discover that during the night the dog had hopped up on the bed and stretched out next to him. He wasn’t convinced shampoo would get rid of fleas and the like. What if the animal’s fur was full of tiny vermin that wanted nothing more than to hop on to Mellberg’s ample body? But a close examination hadn’t revealed anything lurking in the fur, and Annika had sworn that she hadn’t found any fleas when she washed the dog. But he was damned if he’d allow the mutt to sleep on the bed again. There had to be a limit.

‘So, what are we going to call you?’ said Mellberg, instantly feeling foolish for talking to a creature who walked on all fours. But the dog needed a name. He thought it over as he looked about for something that might inspire him, but only stupid dog names whirled through his mind: Fido, Spot… No, that wouldn’t do. Then he gave a chuckle. He’d just had a brilliant idea. In all honesty he’d missed Ernst Lundgren, not much but at least a little, ever since he’d been forced to fire the man. So why not call the dog Ernst? There was a certain humour in the choice. He chuckled again.