The intercom is a device that is well known to everyone who lives in a block. By weird chance, in my house it is more often broken than working, but it is possible that the heat has done something to it. Actually, I am not surprised; it doesn't help me either. The intercom allows young people to avoid running up and downstairs, taking the lift and verbal communication between the ground and the tenth floor, which is ineffective and annoying for the neighbours. It turns out that in the imagination of some people, the intercom may be a tool used to torture residents. And I am not talking about nasty jokes of bored teenagers.

Spurred by three excellent books about the prosecutor Szacki, I went for the next book by Zygmunt Miłoszewski. I expected another criminal novel, the more so since "Intercom" starts with the bloody death of a resident of an apartment block in the Warsaw district of Praga. The police appear at the block and ... this is the end of the criminal story.

"Intercom" is a thriller with surprising plot twists written in the style of Carlos Ruiz Zafon. In the foreground we have a loving young couple who intend to start their new life in Warsaw. You can imagine that a headless corpse on the day of their arrival is only the beginning of a streak of unusual and scary affairs. The nightmare affects not only these new residents. The majority of them struggle with their own demons that terrify them at night.

Home – a place which most of us treat as a safe haven becomes, for the residents of a block on Bródno, a mortal threat. Scary voices in the intercom, doors which nobody can open and blackness swathing everything... It is hard to believe that now, when we have smartphones and mobile internet in the middle of the city, evil could lurk. What is it? Is it only in the heads of the residents or is it substantial like dirty water in the tap? Agnieszka, Wiktor and Kamil try to unravel the mystery of their place of residence. They will learn a lot; not only about its history, but about themselves and their neighbors as well. Difficult situations bring out of people their good and bad sides. You find out who you can count on and who will be interested only in their own safety.

Do we, the residents of blocks in big anonymous cities, always know who lives behind the wall? I think we don't. It is interesting to think about how we would behave if our own home locked us inside. A terrible thought... and why is my intercom not working again...?