Silence of the Grave by Arnaldur Indriðason

defending their mother: the younger one was seven and the older one twelve. By now they knew their father's state of mind when he attacked her, all the invective he used to work himself up to it and then the rage that seized him when he screamed curses at her. Then they would flee the scene. Simon, the older one, went first. He would grab his brother and snatch him away too, pulling him along like a frightened lamb, petrified that their father would turn his wrath upon them.
One day he would be able to take Mikkelína with them.
And one day he would be able to defend his mother.
The terrified brothers ran out of the house and headed for the redcurrant bushes. It was autumn and the bushes were in bloom, with thick foliage and little red berries swollen with juice that burst in their hands when they picked them to fill tins and jars that their mother had given them.
They threw themselves to the ground on the other side of the bushes, listening to their father's curses and oaths and the sound of breaking plates and their mother's screams. The younger boy covered his ears, but Simon looked in through the kitchen window that cast its yellowish glow out into the twilight, and he forced himself to listen to her howls.
He had stopped covering his ears. He had to listen if he was to do what he needed to do.

10
Elsa was not exaggerating about the cellar in Benjamín's house. It was packed with junk and for a moment Erlendur found the prospect too daunting. He wondered about calling in Elínborg and Sigurdur Óli, but decided to keep that on hold. The cellar measured about 90 square metres and was partitioned off into a number of different-sized rooms, with no doors or windows, full of boxes and more boxes, some labelled, but most not. There were cardboard boxes that once contained wine bottles and cigarettes, and wooden crates, in all conceivable sizes and filled with an endless assortment of rubbish. In the cellar were also old cupboards, chests, suitcases and sundry items that had accumulated over a long time: dusty bicycles, lawn mowers, an old barbecue grill.
"You can rummage through that as you please," Elsa said when she followed him down. "If there's anything I can help you with, just call me." She half pitied this frowning detective who seemed somewhat absent-minded, shabbily dressed in his tatty cardigan under an old jacket with worn patches on the elbows. She sensed a certain sorrow about him when she talked to him and looked him in the eye.
Erlendur gave a vague smile and thanked her. Two hours later he found the first documents from Benjamín Knudsen the merchant. He had an awful time working through the cellar. Everything was disorganised. Old and more recent junk was mixed up in huge piles that he had to examine and move in order to make progress into the heap. However, the further he slowly made his way across the floor, the older the rubbish seemed to be that he was sorting through. He felt like having a coffee and a cigarette and he wondered whether to pester Elsa or go out for a break and find a cafe.
Eva Lind never left his thoughts. He had his mobile on him and was expecting a call from the hospital at any moment. His conscience plagued him for not being with her. Maybe he should take a few days off, sit beside his daughter and talk to her as the doctor had urged him to. Be with her instead of leaving her in intensive care, unconscious, with no family or comforting words, all by herself. But he knew he could never sit idly waiting by her bedside. Work was a form of salvation. He needed it to occupy his mind. Prevent himself from thinking the worst. The unthinkable.
He tried to concentrate as he worked his way through the cellar. In an old desk he found some invoices from wholesalers addressed to Knudsen's shop. They were handwritten and difficult to decipher, but they seemed to involve deliveries of goods. Similar bills were in the desk cupboard and Erlendur's first impression was that Knudsen had run a grocery.