Based on the work of Richard Bandler, the Andreases and the others including the authors, Time Line Therapy is a study of most of the important elements that make up a person's core personality: time line therapy, meta programs, and values.
Time line therapy is how people actually store their memories.
Meta programs are the most basic filters that process the sensory data we receive from the outside world. Values serve as filtering mechanisms in the processing of our sensory data.
This book explores the notion of time as stored in the mind and how this shapes and affects actual experience of the world. A very popular book containing many interesting contexts for change, and a large section on metaprograms. This book is a must for anyone interested in NLP, or who wishes to better understand others.