Book by Enrique Sacanell (Libros de Cabecera, 2016, 228 pages), a practical manual on how conversations actually work: asking well, understanding your own emotions, active listening, reaching agreements and closing them properly.
On my radar, not read yet. Same territory as Difficult conversations make monsters grow.
https://dixit.gencat.cat/ca/detalls/Article/arte_conversaciones_dificiles