The Taunton Press has published architecture professor Sarah Nettleton's guide to efficient living (not more efficient if it doesn't need to be, not simpler if it already is: efficient and simple living, period.) The photography alone in The Simple Home could hold your interest, but the concepts themselves are equally gripping, zen as they are. And while every concept is not born from a specifically "green" mentality, Nettleton is a sustainably-minded architect and key themes from the book, like establishing a culture of minimal and letting every object and its manufacture be well-considered are as core to green living as it gets. $40, or $26.40 on Amazon.