Games, Design and Play (by Colleen Macklin and John Sharp) is a solid practical book that lays out an iterative design process. While it focuses on video game development, more than 90% of the material applies to game design in general (product design to a degree). This book is a fairly quick read and full of practical advice.
Design permeates our lives. It is everywhere. I was recently re-binging a Netflix show, Nailed It!, and began to think about the design of the game in the show.