All in all, the book is a well written and researched examination of moving away from the reward/punishment model. Kohn's work can come off as ranting at times but if you can get past that "Unconditional Parenting" is a great read. This book tends to be little more theoretical but the later chapters contain a few specific techniques.
From Amazon - Introduction
"Most parenting guides begin with the question "How can we get kids to do what they're told?" and then proceed to offer various techniques for controlling them. In this truly groundbreaking book, nationally respected educator Alfie Kohn begins instead by asking, "What do kids need—and how can we meet those needs?" What follows from that question are ideas for working with children rather than doing things to them."
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