Penny Tompkins and James Lawley personally recommend every one of these books:
The book that started the Cognitive Linguistic revolution in 1980. This edition has a fascinating afterword about the development of Lakoff and Johnson's metaphors for how metaphors works!
A must for all those interested in how language and thought influence one another. Essential for all students of Symbolic Modelling and David Grove's work.
Penny and James have both been UKCP registered neurolinguistic psychotherapists since 1993, supervisors, coaches in business, and certified NLP trainers. They co-authored Metaphors in Mind: Transformation through Symbolic Modelling and a training DVD, A Strange and Strong Sensation. They are the founders of The Developing Company and creators of Symbolic Modelling which uses the Clean Language of David Grove.