In their excellent book, Clean Language: Revealing Metaphors and Opening Minds, Wendy Sullivan and Judy Rees give an in-depth yet highly accessible route-map for understanding the metaphorical nature of human perception, and for developing powerful skills for working in the domain of personal metaphor.
While I expected the subject to be covered in masterful detail, what I didn't anticipate was such a cogent and useful introduction to the role metaphors play in perception. Wendy and Judy present this material in a way that's easy to grasp, and pull together understandings and realisations that you would otherwise have to piece together from diverse sources.
Of course, the core of the book is the application of the clean language questions. There are numerous exercises for developing intuitions about what to ask when, and for what purpose. If you've been wondering about what “Clean” is and how you can use it, or you've already got some skills in this powerful domain, Wendy and Judy's book will provide you with new depths of insight, skill and effectiveness.