Book that I probably should have read much earlier.
The model of communication without judgement, but with observations, emotions, needs and request changed the way I think about communication in my everyday situations.
I am far from using it all the time but I think that it can really help. Best thing is that it was first time I have any idea how to constructively talk about bad emotions like frustration or anger.
I have a plan to read this one in Polish as well and maybe red one of additional books about this method in a couple of months as a rehearsal.