A book explaining tips for communication to facilitate smooth interpersonal relationships. I purchased it, but I am listing it for sale without ever reading it. - Title: People's Communication Skills are 90% - Author: Shigehisa Nagamatsu - Genre: Business/Economics - Features: A book packed with know-how on interpersonal relationships - Rating: #1 book of 2021 Thank you for viewing. Self-help book People's Communication Skills are 90%